PotlatchDeltic (PCH) 10-K 17 Feb 17 2016 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 31, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	PCH
Entity Registrant Name	POTLATCH CORP
Entity Central Index Key	1,338,749
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		40,547,225
Entity Public Float			$ 1,381.7

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Revenues	$ 599,099	$ 575,336	$ 606,950
Costs and expenses:
Cost of goods sold	462,304	470,037	429,789
Selling, general and administrative expenses	52,719	46,392	44,655
Loss on sale of central Idaho timber and timberlands	48,522
Total costs and expenses	563,545	516,429	474,444
Operating income	35,554	58,907	132,506
Interest expense, net	(28,941)	(32,761)	(22,909)
Income before income taxes	6,613	26,146	109,597
Income tax benefit (provision)	4,325	5,568	(19,687)
Net income	$ 10,938	$ 31,714	$ 89,910
Net income per share:
Basic (in dollars per share)	$ 0.27	$ 0.78	$ 2.21
Diluted (in dollars per share)	0.27	0.77	2.20
Distributions per share (in dollars per share)	$ 1.50	$ 1.50	$ 1.425
Weighted-average shares outstanding (in thousands)
Basic (in shares)	40,797,806	40,842,126	40,748,924
Diluted (in shares)	41,033,440	40,987,819	40,894,382

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 10,938	$ 31,714	$ 89,910
Other comprehensive income (loss), net of tax:
Net loss arising during the period, net of tax benefit of $(1,826), $(1,913) and $(15,598)	(2,857)	(2,990)	(24,396)
Amortization of actuarial loss included in net periodic cost, net of tax expense of $7,042, $7,794 and $6,488	11,014	12,190	10,149
Amortization of prior service credit included in net periodic cost, net of tax benefit of $(3,260), $(3,396) and $(3,468)	(5,099)	(5,311)	(5,425)
Cash flow hedge, net of tax of $448, $-, and $-	701	0	0
Other comprehensive income (loss), net of tax	3,759	3,889	(19,672)
Comprehensive income	$ 14,697	$ 35,603	$ 70,238

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net loss arising during the period, tax benefit	$ (1,826)	$ (1,913)	$ (15,598)
Amortization of actuarial loss included in net periodic cost, tax expense	7,042	7,794	6,488
Amortization of prior service credit included in net periodic cost, tax benefit	(3,260)	(3,396)	(3,468)
Cash flow hedge, tax effect	$ 448	$ 0	$ 0

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	[1],[2]	$ 82,584	$ 7,925
Receivables, net of allowance for doubtful accounts of $510 and $440		17,284	13,420
Inventories		52,622	35,162
Other assets		11,155	14,246
Total current assets		163,645	70,753
Property, plant and equipment, net		72,820	75,285
Timber and timberlands, net		641,856	816,599
Deferred tax assets, net		42,051	46,600
Other assets		7,309	7,375
Total assets		927,681	1,016,612
Current liabilities:
Revolving line of credit borrowings		0	30,000
Current portion of long-term debt		11,032	5,007
Accounts payable and accrued liabilities		43,710	39,740
Current portion of pension and other postretirement employee benefits		5,839	5,973
Total current liabilities		60,581	80,720
Long-term debt		572,956	598,874
Pension and other postretirement employee benefits		123,284	119,369
Other long-term obligations		14,586	13,913
Total liabilities		771,407	812,876
Commitments and contingencies
Stockholders’ equity:
Preferred stock, authorized 4,000,000 shares, no shares issued		0	0
Common stock, $1 par value, authorized 100,000,000 shares, issued 40,519,351 and 40,680,713 shares		40,519	40,681
Additional paid-in capital		355,274	350,541
Accumulated deficit		(128,775)	(72,983)
Accumulated other comprehensive loss		(110,744)	(114,503)
Total stockholders’ equity		156,274	203,736
Total liabilities and stockholders' equity		$ 927,681	$ 1,016,612
[1]	Certain short-term investments in 2015 and 2014 were reclassified to cash and cash equivalents to conform with the 2016 presentation.
[2]	Short-term investments as of December 31, 2015 were reclassified to cash and cash equivalents to conform with the 2016 presentation.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 510	$ 440
Preferred stock, authorized	4,000,000	4,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 1	$ 1
Common stock, authorized	100,000,000	100,000,000
Common stock, issued	40,519,351	40,680,713

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 10,938		$ 31,714		$ 89,910
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization		34,190		38,105		26,749
Basis of real estate sold		8,011		7,012		8,646
Change in deferred taxes		1,853		(5,696)		(1,616)
Employee benefit plans		10,479		4,986		2,122
Equity-based compensation expense		4,390		4,758		4,137
Loss on sale of central Idaho timber and timberlands		48,522
Other, net		(1,198)		(2,046)		(2,191)
Change in:
Receivables		(3,712)		(3,864)		7,016
Inventories		(17,460)		(3,672)		4,785
Other assets		(473)		898		(1,421)
Accounts payable and accrued liabilities		7,232		267		(2,388)
Other liabilities		645		1,552		(827)
Funding of qualified pension plans		(1,300)				(3,550)
Net cash from operating activities		102,117		74,014		131,372
CASH FLOWS FROM INVESTING ACTIVITIES
Change in short-term investments	[1]			6,995		1,810
Transfer from company owned life insurance (COLI)		6,384		1,492		28,870
Transfer to COLI		(3,967)				(25,515)
Purchase of property, plant and equipment		(5,866)		(18,987)		(13,261)
Timberlands reforestation and roads		(13,422)		(13,745)		(10,971)
Acquisition of timber and timberlands		(1,244)		(10,230)		(388,952)
Net proceeds from sale of central Idaho timber and timberlands		111,460
Other, net		6		886		1,263
Net cash from investing activities		93,351		(33,589)		(406,756)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends to common stockholders		(60,842)		(61,017)		(57,848)
Revolving line of credit borrowings (repayment)		(30,000)		30,000
Repayment of long-term debt		(113,335)		(22,500)
Repurchase of common stock		(5,956)
Proceeds from issuance of long-term debt		93,235				310,000
Other, net		(3,911)		(3,000)		(1,783)
Net cash from financing activities		(120,809)		(56,517)		250,369
Change in cash and cash equivalents	[1]	74,659		(16,092)		(25,015)
Cash and cash equivalents at beginning of year	[1]	7,925	[2]	24,017		49,032
Cash and cash equivalents at end of year	[1]	82,584	[2]	7,925	[2]	24,017
Cash paid (received) during the year for:
Interest, net of amounts capitalized		28,051		29,676		20,918
Income taxes, net		$ (8,081)		$ 1,576		$ 18,104
[1]	Certain short-term investments in 2015 and 2014 were reclassified to cash and cash equivalents to conform with the 2016 presentation.
[2]	Short-term investments as of December 31, 2015 were reclassified to cash and cash equivalents to conform with the 2016 presentation.

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance, beginning of period (shares) at Dec. 31, 2013		40,536,879
Balance, beginning of period at Dec. 31, 2013	$ 204,148	$ 40,537	$ 337,887	$ (75,556)	$ (98,720)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and stock awards (shares)		12,859
Exercise of stock options and stock awards	398	$ 13	385
Performance share and restricted stock unit (shares)		55,441
Performance shares and restricted stock units	2,935	$ 55	2,974	(94)
Net income	89,910			89,910
Director deferred stock awards	5,195		5,195
Pension plans and OPEB obligations	(19,672)				(19,672)
Cash flow hedge, net of tax of $448, $-, and $-	0
Common distributions, $1.425 per share 2014, $1.50 per share 2015, $1.50 per share 2016	(57,848)			(57,848)
Balance, end of period (shares) at Dec. 31, 2014		40,605,179
Balance, end of period at Dec. 31, 2014	225,066	$ 40,605	346,441	(43,588)	(118,392)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Performance share and restricted stock unit (shares)		75,534
Performance shares and restricted stock units	3,390	$ 76	3,406	(92)
Net income	31,714			31,714
Director deferred stock awards	701		701
Pension plans and OPEB obligations	3,889				3,889
Transfer of assets from REIT to subsidiary	(7)		(7)
Cash flow hedge, net of tax of $448, $-, and $-	0
Common distributions, $1.425 per share 2014, $1.50 per share 2015, $1.50 per share 2016	(61,017)			(61,017)
Balance, end of period (shares) at Dec. 31, 2015		40,680,713
Balance, end of period at Dec. 31, 2015	203,736	$ 40,681	350,541	(72,983)	(114,503)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Performance share and restricted stock unit (shares)		8,263
Performance shares and restricted stock units	3,971	$ 8	4,065	(102)
Net income	10,938			10,938
Director deferred stock awards	668		668
Pension plans and OPEB obligations	3,058				3,058
Repurchase of common stock (shares)		(169,625)
Repurchase of common stock	(5,956)	$ (170)		(5,786)
Cash flow hedge, net of tax of $448, $-, and $-	701				701
Common distributions, $1.425 per share 2014, $1.50 per share 2015, $1.50 per share 2016	(60,842)			(60,842)
Balance, end of period (shares) at Dec. 31, 2016		40,519,351
Balance, end of period at Dec. 31, 2016	$ 156,274	$ 40,519	$ 355,274	$ (128,775)	$ (110,744)

Consolidated Statements of Sto9

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Stockholders Equity [Abstract]
Common dividends, per share	$ 1.50	$ 1.50	$ 1.425

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES GENERAL We are primarily engaged in activities associated with timberland management, including the sale of timber, the management of approximately 1.4 million acres of timberlands and the purchase and sale of timberlands. We are also engaged in the manufacture and sale of wood products. Our timberlands and all of our wood products facilities are located within the continental United States. The primary market for our products is the United States. We converted to a Real Estate Investment Trust (REIT) effective January 1, 2006. CONSOLIDATION The Consolidated Financial Statements SIGNIFICANT ESTIMATES The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, which we refer to in this report as U.S. GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and assumptions. Significant estimates include timber volumes, income projections and tax planning strategies used to support realization of deferred tax assets, environmental liabilities, pension and postretirement obligation assumptions, the fair value of derivative instruments and assumptions utilized for asset and disposal group impairment tests. These significant estimates are described in further detail below. Cash and Cash Equivalents Cash equivalents are investments that are highly liquid with maturities of three months or less. SHORT-TERM INVESTMENTS We classify our short-term investments as “available for sale.” All short-term investments of REIT funds are made in compliance with the requirements of the Internal Revenue Code with respect to qualifying REIT investments. INVENTORIES The last-in, first-out method is used to determine the cost of logs, lumber and plywood for most of our operations. The average cost method is used to determine the cost of all other inventories. Inventories are stated at the lower of cost or net realizable value. Expenses associated with idle capacity or other curtailments of production are reflected in cost of goods sold in the periods incurred. PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment are valued at cost less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method of depreciation. Major improvements and replacements of property are capitalized. Maintenance, repairs and minor improvements and replacements are expensed. Upon retirement or other disposition of property, applicable cost and accumulated depreciation are removed from the accounts. Any gains or losses are included in earnings. TIMBER AND TIMBERLANDS Timber and timberlands are valued at cost less accumulated depletion and amortization. We capitalize costs related to stand establishment, which include the preparation of the land for planting, seeds or seedlings and tree planting costs, which include third-party labor costs, materials and other contract services. Upon completion of planting activities and field inspection to confirm the planting operation was successful, a plantation will be considered “established.” Subsequent expenditures to maintain the integrity or enhance the growth of an established plantation or stand are expensed. Post-establishment expenses include vegetation control, fertilization, thinning operations and the replanting of seedlings lost through mortality. Forest management costs are considered current operating expenses and include property taxes and insurance, silviculture costs incurred subsequent to stand establishment, cruising (physical inventory), property maintenance, salaries, supplies, travel, record-keeping, fire protection and other normal recurring administrative personnel costs. Timberland acquisitions are capitalized based on the relative appraised values of timberland, merchantable sawlogs, merchantable pulpwood, pre-production (young growth not yet merchantable), logging roads and other land improvements. The aggregate estimated volume of current standing merchantable timber inventory, which is a component of calculating our depletion rates, is updated at least annually to reflect increases due to the reclassification of young growth to merchantable timber when the young growth meets defined diameter specifications, the annual growth of merchantable timber and the acquisition of additional merchantable timber and to reflect decreases due to timber harvests and land sales. Timber volumes are estimated from cruises of the timber tracts, which are completed on our timberlands on approximately a five to ten year cycle. Individual cruises are compiled to create a growth projection model. Depletion represents the amount charged to expense as fee timber is harvested. Rates at which timber is depleted are calculated annually for each of our depletion pools by dividing the beginning of year balance of the merchantable timber accounts by the forest inventory volume, after inventory updates for growth projection adjustments and new timber cruises. The base cost of logging roads, such as clearing, grading and ditching, is not amortized and remains a capitalized item until obliteration or other disposition. Other portions of the initial logging road cost, such as bridges, culverts and gravel surfacing are amortized over their useful lives, which range from 5 to 20 years. Costs associated with temporary logging road spurs are expensed as incurred. REAL ESTATE SALES Sales of non-core timberland are considered to be part of our normal operations. We therefore classify revenue and costs associated with real estate sold in revenues and cost of goods sold, respectively, in our Consolidated Statements of Income Consolidated Statements of Cash Flows . The sale of large parcels of property, such as our sale of central Idaho, that do not represent our core operations and are of such a size as to not be indicative of our ongoing operations, are presented as a net gain or loss in our Consolidated Statements of Income Consolidated Statements of Cash Flows . LONG-LIVED ASSETS Our long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable, as measured by its undiscounted estimated future cash flows. We use our operational budgets to estimate future cash flows. The estimates are adjusted periodically to reflect changing business conditions. Impaired assets are written down to fair value. Assets to be disposed of are reported at the lower of carrying amount or fair value less cost to sell. We recognize a liability and an asset equal to the fair value of our legal obligations to perform asset retirement activities if the amount can be reasonably estimated. We review these obligations annually and do not expect them to have a material effect on our financial position, results of operations or cash flows. INCOME TAXES We use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases, operating loss carryforwards and tax credit carryforwards. Deferred tax assets and liabilities are measured pursuant to tax laws using rates expected to apply to taxable income in the years in which the temporary differences are expected to be recovered or settled. We recognize the effect of a change in income tax rates on deferred tax assets and liabilities in the Consolidated Statements of Income Consolidated Statements of Comprehensive Income REVENUE RECOGNITION We recognize revenue from the sale of timber when risk of loss transfers to the buyer and the quantity sold is determinable. These sales usually take the form of delivered logs, pay-as-cut stumpage contracts, lump sum stumpage contracts or timber deeds. On delivered log sales, revenue includes amounts billed for logging and hauling and is recognized at the point the logs are delivered and scaled. Revenue is recognized on timber deeds and lump sum stumpage contracts generally upon closing or when the contracts are effective, which is the point at which the buyer assumes risk of loss associated with the standing timber. We recognize revenue from the sale of manufactured wood products and residual by-products when there is persuasive evidence of a sales agreement, the price to the customer is fixed and determinable, collection is reasonably assured and title and the risk of loss passes to the customer. Shipping terms generally indicate when title and the risk of loss have passed. Revenue is recognized at shipment when shipping terms are FOB (free on board) shipping point. For sales where shipping terms are FOB destination, revenue is recognized when the goods are received by the customer. We receive cash consideration in full and recognize revenue at closing on substantially all of our real estate sales. While sales taxes are not typical, in the event sales taxes are collected, revenue is recognized net of any sales tax and sales taxes are recorded as a current liability and remitted to the appropriate governmental entities. Costs for shipping and handling are included in cost of goods sold in our Consolidated Statements of Income EQUITY-BASED COMPENSATION Equity-based awards are measured at fair value on the dates they are granted or modified. These measurements establish the cost of the equity-based awards for accounting purposes. The cost of the equity-based award is then recognized in the Consolidated Statements of Income Note 12: Equity-Based Compensation Plans Reclassifications We have historically classified money market funds and interest bearing cash as short-term investments. During the fourth quarter of 2016, money market funds and interest bearing cash accounts previously classified as short-term investment balances, which are highly liquid and have maturities of three months or less, have been reclassified to cash equivalents. We believe the change is preferable, as aggregating cash and cash equivalents more clearly reflects the substance of our use of money market funds and interest bearing cash accounts as a cash management tool and not as part of an investment strategy. In addition, the presentation is comparable to industry peer companies. There is no change to income from continuing operations, comprehensive income, total current assets, total assets, or stockholders’ equity. This change has been reported through a retrospective application of the new policy to all periods presented. A summary of the adjustments are presented below. See Note 16: Financial Results by Quarter (unaudited ) Consolidated Balance Sheets 2015 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Cash and cash equivalents $ — $ 7,925 $ 7,925 Cash $ 7,886 $ (7,886 ) $ — Short-term investments $ 39 $ (39 ) $ — Consolidated Statement of Cash Flows 2015 2014 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Change in short-term investments $ 26,329 $ (19,334 ) $ 6,995 $ 25,883 $ (24,073 ) $ 1,810 Net cash from investing activities $ (14,255 ) $ (19,334 ) $ (33,589 ) $ (382,683 ) $ (24,073 ) $ (406,756 ) Change in cash and cash equivalents $ 3,242 $ (19,334 ) $ (16,092 ) $ (942 ) $ (24,073 ) $ (25,015 ) Cash and cash equivalents at beginning of year $ 4,644 $ 19,373 $ 24,017 $ 5,586 $ 43,446 $ 49,032 Cash and cash equivalents at end of year $ 7,886 $ 39 $ 7,925 $ 4,644 $ 19,373 $ 24,017 NEW ACCOUNTING PRONOUNCEMENTS In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers: Topic 606 Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date In May 2015, the FASB issued ASU No. 2015-07, Disclosures for Investments in Certain Entities that Calculate Net Asset Value per Share (or Its Equivalent) Technical Corrections and Improvements Note 11: Savings Plans, Pension Plans and Other Postretirement Employee Benefits In February 2016, the FASB issued ASU No. 2016-02, Leases, which, among other things, requires lessees to recognize most leases on the balance sheet. We have operating leases covering office space, equipment and vehicles expiring at various dates through 2033, which would require a right-of-use asset and a lease liability, initially measured at the present value of the lease payments, to be recognized in the statement of financial position. Lease costs would generally continue to be recognized on a straight-line basis. We expect our right-of-use asset and lease liability will approximate our current future minimum lease payments required under our operating leases, which were $15.2 million at December 31, 2016. The ASU is effective for us on January 1, 2019. In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which eliminates the probable recognition threshold for credit impairments. The new guidance broadens the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually to include forecasted information, as well as past events and current conditions. The guidance provides no specified method for measuring expected credit losses, and an entity is allowed to apply methods that reasonably reflect its expectations of the credit loss estimate. This ASU is effective for us on January 1, 2020. Our credit loss estimates are reflected in our allowance for doubtful accounts on accounts receivables, which had a balance of $0.5 million at December 31, 2016. The adoption of this guidance is not expected to have a significant effect on our consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In January 2017, the FASB issued ASU 2017-1, Business Combinations (Topic 805): Clarifying the Definition of a Business

Earnings per Share

Earnings per Share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share Basic Other Disclosures [Abstract]
Earnings per Share	NOTE 2. EARNINGS PER SHARE The following table reconciles the number of shares used in calculating the basic and diluted earnings per share for the years ended December 31: (Dollars in thousands, except per share amounts) 2016 2015 2014 Net income $ 10,938 $ 31,714 $ 89,910 Basic weighted-average shares outstanding 40,797,806 40,842,126 40,748,924 Incremental shares due to: Performance shares 200,164 122,334 117,830 Restricted stock units 35,470 23,359 27,628 Diluted weighted-average shares outstanding 41,033,440 40,987,819 40,894,382 Basic net income per share $ 0.27 $ 0.78 $ 2.21 Diluted net income per share $ 0.27 $ 0.77 $ 2.20 For stock-based awards, the dilutive effect is calculated using the treasury stock method. Under this method, the dilutive effect is computed as if the awards were exercised at the beginning of the period (or at time of issuance, if later) and assumes the related proceeds were used to repurchase common stock at the average market price during the period. Related proceeds include the amount the employee must pay upon exercise, future compensation cost associated with the stock award and the amount of excess tax benefits, if any. At December 31, 2016 and 2014, there were 503 and 1,216 stock-based awards, respectively, which were excluded from the calculation of earnings per share because they were anti-dilutive. At December 31, 2015, there were no anti-dilutive stock-based awards. On April 26, 2016, we announced that our board of directors had authorized management to repurchase up to $60 million of common stock over a period of 24 months (the “Repurchase Plan”). We repurchased 169,625 shares of common stock during the second quarter of 2016 at an average price of $35.08 per share. We retire shares upon repurchase. Any excess repurchase price over par is recorded in accumulated deficit.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventories	NOTE 3. INVENTORIES (Dollars in thousands) 2016 2015 Logs $ 23,342 $ 9,920 Lumber, plywood and veneer 20,500 16,932 Materials and supplies 8,780 8,310 $ 52,622 $ 35,162 Valued at lower of cost or net realizable value: Last-in, first-out basis $ 29,769 $ 16,686 Average cost basis 22,853 18,476 Total inventories $ 52,622 $ 35,162 Log inventories increased due to a combination of both favorable logging and hauling conditions in 2016 and unfavorable conditions in 2015. If the last-in, first-out inventory had been carried at average cost, the values would have been higher by approximately $11.1 million, $10.6 million and $11.0 million at December 31, 2016, 2015 and 2014, respectively.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	NOTE 4. PROPERTY, PLANT AND EQUIPMENT (Dollars in thousands) Range of useful lives 2016 2015 Land $ 4,712 $ 4,736 Buildings and improvements 10-40 years 54,448 54,362 Machinery and equipment 2-25 years 190,316 189,428 Construction in progress 1,437 224 250,913 248,750 Less: accumulated depreciation (178,093 ) (173,465 ) Total property, plant and equipment, net $ 72,820 $ 75,285 Depreciation charged against operating income totaled $8.3 million, $8.2 million and $8.1 million in 2016, 2015 and 2014, respectively. Interest expense capitalized was inconsequential in 2016, and $0.2 million and $0.1 million in 2015 and 2014, respectively.

Timber and Timberlands

Timber and Timberlands	12 Months Ended
	Dec. 31, 2016
Timber And Timberlands [Abstract]
Timber and Timberlands	NOTE 5. TIMBER AND TIMBERLANDS (Dollars in thousands) 2016 2015 Timber and timberlands $ 572,273 $ 745,634 Logging roads 69,583 70,965 Total timber and timberlands, net $ 641,856 $ 816,599 Depletion from company-owned lands totaled $20.8 million, $25.3 million and $14.5 million in 2016, 2015 and 2014, respectively. Amortization of road costs, such as bridges, culverts and gravel surfacing, totaled $3.1 million, $3.1 million and $2.8 million in 2016, 2015 and 2014, respectively. Future payments due under timber cutting contracts as of December 31, 2016 are as follows: (Dollars in thousands) 2017 $ 6,741 2018 5,275 2019 1,604 2020 32 2021 275 Total $ 13,927 LOSS ON SALE OF CENTRAL IDAHO TIMBER AND TIMBERLANDS On April 21, 2016, we sold approximately 172,000 114 48.5

Current Other Assets

Current Other Assets	12 Months Ended
	Dec. 31, 2016
Other Assets [Abstract]
Current Other Assets	NOTE 6. CURRENT OTHER ASSETS (Dollars in thousands) 2016 2015 Real estate held for sale $ 9,184 $ 12,708 Prepaid expenses 1,939 1,531 Interest rate swaps 32 7 Total current other assets $ 11,155 $ 14,246

Accounts Payable and Accrued Li

Accounts Payable and Accrued Liabilities	12 Months Ended
	Dec. 31, 2016
Accounts Payable And Accrued Liabilities Current And Noncurrent [Abstract]
Accounts Payable and Accrued Liabilities	NOTE 7. ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Dollars in thousands) 2016 2015 Accrued payroll and benefits $ 13,634 $ 9,509 Accounts payable 8,382 6,351 Accrued interest 6,237 6,797 Accrued taxes 4,956 5,304 Other current liabilities 10,501 11,779 Total accounts payable and accrued liabilities $ 43,710 $ 39,740

Debt

Debt	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Debt	NOTE 8. DEBT (Dollars in thousands) 2016 2015 Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 $ 349,500 $ 322,000 Senior notes, 7.50% due 2019 150,000 150,000 Revenue bonds, 2.75% due 2024 65,735 108,335 Medium-term notes, 8.75% to 8.89%, due 2017 through 2022 22,250 27,250 Long-term principal 587,485 607,585 Interest rate swaps 247 581 Less debt issuance costs (3,015 ) (3,037 ) Less unamortized discounts (729 ) (1,248 ) Total long-term debt (includes current portion) 583,988 603,881 Less current portion of long-term debt (11,032 ) (5,007 ) Long-term debt $ 572,956 $ 598,874 Term loan variable rates are based on three-month LIBOR of 0.85% at December 31, 2016. TERM LOANS In February 2016, we amended the term loan agreement to provide an additional $27.5 million borrowing. The additional tranche refinanced long-term debt that matured in December 2015 and February 2016. The new debt matures in 2026 and carries a rate equal to 3-month LIBOR plus 2.15% annum. At December 31, 2016, the amended term loan agreement includes nine tranches consisting of the following: • two $6 million tranches, with rates of 2.95% maturing in 2017 and 3.70% maturing in 2020; • three $40 million tranches maturing each year from 2019 through 2021 at variable rates based on three-month LIBOR plus a spread between 1.65% and 1.90%; • two $40 million tranches with rates of 4.29% maturing in 2022 and 4.49% maturing in 2023; • one tranche of $110 million with a rate of 4.64% maturing in 2024; and • one tranche of $27.5 million with a rate of 2.15% plus three-month LIBOR. We were in compliance with all term loan debt covenants at December 31, 2016 and 2015. SENIOR NOTES In 2009, we sold $150 million aggregate principal amount of 7.50% senior notes. The terms of these notes limit our ability, and the ability of any subsidiary guarantors, to borrow money, pay dividends, redeem or repurchase capital stock, enter into sale and leaseback transactions and create liens. MEDIUM-TERM NOTES AND REVENUE BONDS The medium term notes were originally issued during 1991 and 1992. In June 2016, we repaid $42.6 million of revenue bonds. The bonds carried a rate of 5.90% and matured in 2026. In August 2016, we refinanced $65.7 million of revenue bonds at a rate of 2.75%. The original bonds, which carried a rate of 6.00%, were extinguished and a new debt obligation was simultaneously issued. The principal balance and maturity date in 2024 remain unchanged. DEBT ISSUANCE COSTS Debt issuance costs represent the capitalized direct costs incurred related to the issuance of debt. These costs are amortized to interest expense over the terms of the respective borrowings. DEBT MATURITIES Scheduled principal payments due on long-term debt as of December 31, 2016 are as follows: (Dollars in thousands) 2017 $ 11,000 2018 14,250 2019 190,000 2020 46,000 2021 40,000 Thereafter 286,235 Total $ 587,485 Principal repayments on long-term debt occur at maturity. Our debt obligations are of equal priority. CREDIT AGREEMENT On August 12, 2014, we entered into an amended and restated credit agreement with an expiration date of February 12, 2020. The credit agreement provides for a revolving line of credit with an initial aggregate principal amount not to exceed $250 million, which may be increased by up to an additional $250 million. It also includes a sublimit of $40 million for the issuance of standby letters of credit and a sublimit of $25 million for swing line loans. Usage under either or both subfacilities reduces availability under the revolving line of credit. As of December 31, 2016, there were no Pricing is set according to the type of borrowing. LIBOR Loans are issued at a rate equal to the British Bankers Association LIBOR Rate, while Base Rate Loans are issued at a rate equal to the Base Rate, which is a fluctuating rate per annum equal to the highest of (a) the Federal Funds Rate plus 1/2 of 1.00%, (b) the rate of interest in effect for such day as publicly announced from time to time by KeyBank as its “prime rate” and (c) the sum of the LIBOR that would apply to a one month Interest Period plus 1.00%. The interest rates we pay for borrowings under either type of loan include an additional Applicable Rate, which can range from 0.875% to 1.70% for LIBOR loans and from 0% to 0.70% for Base Rate loans, depending on our current credit rating. As of December 31, 2016, we were able to borrow under the bank credit facility with the additional applicable rate of 1.50% for LIBOR Loans and 0.50% for Base Rate Loans, with facility fees of 0.25% on the $250 million of the bank credit facility. We were in compliance with all credit facility debt covenants at December 31, 2016 and 2015.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2016
Derivative Instrument Detail [Abstract]
Derivative Instruments	NOTE 9. DERIVATIVE INSTRUMENTS From time to time, we enter into derivative financial instruments to manage certain cash flow and fair value risks. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset or liability to a particular risk, such as interest rate risk, are considered fair value hedges. We have five fair value interest rate swaps with notional amounts totaling $69.3 million associated with $19.3 million of our medium-term notes and $50.0 million of our senior notes. The fair value swaps convert interest payments with fixed rates ranging between 7.50% and 8.89% to a variable rate of 3-month LIBOR plus a spread between 5.84% and 6.29%. Our fair value swaps terminate at various dates between June 2017 and November 2019. Derivatives designated and qualifying as a hedge of the exposure to variability in the cash flows of a specific asset or liability that is attributable to a particular risk, such as interest rate risk, are considered cash flow hedges. We have one interest rate swap with a notional amount of $27.5 million associated with $27.5 million of term loan debt. The cash flow hedge converts a variable rate of 2.15% plus 3-month LIBOR to a fixed rate of 3.88% and terminates in February 2026. Our cash flow hedge is expected to be highly effective in achieving offsetting cash flows attributable to the hedged interest rate risk through the term of the hedge. Therefore, changes in the fair value of the interest rate swap are recorded as a component of other comprehensive income and will be recognized in earnings when the hedged interest rate affects earnings. Changes in the fair value of the ineffective portion are recognized immediately in earnings. There has been no impact on earnings due to ineffectiveness to date. As of December 31, 2016, the amount of net losses expected to be reclassified into earnings in the next 12 months is $0.2 million. The fair values of our cash flow and fair value derivative instruments on our Consolidated Balance Sheets (Dollars in thousands) Asset Derivatives Liability Derivatives Location 2016 2015 Location 2016 2015 Other assets, current $ 32 $ 7 $ — $ — Other assets, non-current 1,363 574 Long-term debt 91 — $ 1,395 $ 581 $ 91 $ — The following table details the effect of derivatives on our Consolidated Statements of Income (Dollars in thousands) Location 2016 2015 2014 Derivatives Realized gain on interest rate contracts 1 Interest $ 805 $ 1,534 $ 979 Derivatives Gain (loss) recognized in other comprehensive income, net of tax (effective portion) $ (916 ) $ — $ — Loss reclassified from accumulated other comprehensive income into interest expense (effective portion) 1 Interest 215 — — Net effect on other comprehensive income $ (701 ) $ — $ — 1 Realized gains and losses on interest rate contracts consist of net cash received or paid and interest accruals on the interest rate swaps during the periods. Net cash received or paid is included in the supplemental cash flow information within interest, net of amounts capitalized in the Consolidated Statements of Cash Flows .

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2016
Derivative Instrument Detail [Abstract]
Financial Instruments	NOTE 10. FINANCIAL INSTRUMENTS FAIR VALUE OF FINANCIAL INSTRUMENTS Estimated fair values of our financial instruments as of December 31 are as follows: 2016 2015 (Dollars in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Cash and cash equivalents (Level 1) $ 82,584 $ 82,584 $ 7,925 $ 7,925 Derivative assets related to interest rate swaps (Level 2) $ 1,395 $ 1,395 $ 581 $ 581 Derivative liabilities related to interest rate swaps (Level 2) $ (91 ) $ (91 ) $ — $ — Long-term debt, including current portion (Level 2): Term Loans $ (349,500 ) $ (350,909 ) $ (322,000 ) $ (322,000 ) Senior notes (149,271 ) (164,250 ) (149,013 ) (165,375 ) Revenue bonds (65,735 ) (62,205 ) (108,074 ) (108,454 ) Medium-term notes (22,250 ) (23,926 ) (27,250 ) (29,611 ) Total long-term debt 1 $ (586,756 ) $ (601,290 ) $ (606,337 ) $ (625,440 ) Company owned life insurance (COLI) (Level 3) $ 70 $ 70 $ 687 $ 687 1 The carrying amount of long-term debt includes principal and unamortized discounts A framework has been established for measuring fair value, which provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The three levels of the fair value hierarchy are described below. Level 1 Level 2 • quoted prices for similar assets or liabilities in active markets; • quoted prices for identical or similar assets or liabilities in inactive markets; • inputs other than quoted prices that are observable for the asset or liability; and • inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 3 inputs to the valuation methodology are unobservable and significant to the fair value measurement. If the asset or liability has a specified (contractual) term, the Level 2 input must be observed for substantially the full term of the asset or liability. The fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable inputs. • For cash and cash-equivalents, the carrying amount approximates fair value due to the short-term nature of these financial instruments. • The fair value of the interest rate swaps was determined using discounted cash flow analysis on the expected cash flows of each derivative. The analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate forward curves. • The fair value of our long-term debt is estimated based upon the quoted market prices for the same or similar debt issues, or estimated based on average market prices for comparable debt when there is no quoted market price. • The contract value of our COLI, the amount at which it could be redeemed, is used to estimate fair value because market prices are not readily available. COMPANY OWNED LIFE INSURANCE We are the beneficiary of insurance policies on the lives of certain current and past officers and employees. We have recognized the amount that could be realized upon surrender of the insurance policies in other assets in our Consolidated Balance Sheets Consolidated Statements of Income Consolidated Statements of Cash Flows .

Savings Plans, Pension Plans an

Savings Plans, Pension Plans and Other Postretirement Employee Benefits	12 Months Ended
	Dec. 31, 2016
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Savings Plans, Pension Plans and Other Postretirement Employee Benefits	NOTE 11. SAVINGS PLANS, PENSION PLANS AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS SAVINGS PLANS Substantially all of our employees are eligible to participate in 401(k) savings plans. In 2016, 2015 and 2014, we made matching 401(k) contributions on behalf of our employees of $2.1 million, $2.1 million and $2.0 million, respectively. Certain eligible employees who earn awards under our annual incentive plan are permitted to defer receipt of those awards. These employees may defer receipt of a minimum of 50% and a maximum of 100% of the award pursuant to rules established under our Management Deferred Compensation Plan. Eligible employees may also defer up to 50% of their base salary under the Management Deferred Compensation Plan. At the employee's election, deferrals may be deemed invested in a company stock unit account, a directed investment account with certain deemed investments available under the 401(k) Plan or a combination of these investment vehicles. If company stock units are elected, dividend equivalents are credited to the units . PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS On January 1, 2011, we froze our pension plans to any new salaried and hourly non-represented employees hired after that date. In late 2009, we restructured our other postretirement benefit plans, effective January 1, 2010. The level of health care subsidy was frozen for retirees so that all future increments in health care costs will be borne by the retirees. In addition, for retirees under age 65, a high deductible medical plan was created and all other existing health care plans were terminated. For retirees age 65 or over, the medical plan is divided into two components, with the company continuing to self-insure prescription drugs and providing a fully-insured medical supplemental plan through AARP/United Healthcare. Both health care plans require the retiree to contribute the amounts in excess of the company subsidy in order to continue coverage. Finally, vision, dental and life insurance coverage for these retirees were terminated. The effect of these retiree plan changes was a reduction in the accumulated postretirement benefit obligation of $76.7 million, which was recognized as of December 31, 2009. We use a December 31 measurement date for our benefit plans and obligations. We recognize the underfunded status of our defined benefit pension plans and other postretirement employee benefit obligations on our Consolidated Balance Sheets Consolidated Statements of Comprehensive Income The change in benefit obligation, change in plan assets and funded status for company-sponsored benefit plans and obligations are as follows: Pension Plans Other Postretirement Employee Benefits (Dollars in thousands) 2016 2015 2016 2015 Benefit obligation at beginning of year $ (382,071 ) $ (417,694 ) $ (35,471 ) $ (41,561 ) Service cost (6,508 ) (6,159 ) (14 ) (22 ) Interest cost (17,020 ) (17,012 ) (1,421 ) (1,456 ) Actuarial gain (loss) (13,997 ) 27,094 (313 ) 3,778 Benefits paid 34,135 31,700 3,882 3,790 Benefit obligation at end of year $ (385,461 ) $ (382,071 ) $ (33,337 ) $ (35,471 ) Fair value of plan assets at beginning of year $ 292,200 $ 337,059 $ — $ — Actual return on plan assets 28,626 (14,970 ) — — Employer contributions and benefit payments 2,984 1,811 3,882 3,790 Benefits paid (34,135 ) (31,700 ) (3,882 ) (3,790 ) Fair value of plan assets at end of year $ 289,675 $ 292,200 $ — $ — Amounts recognized in the consolidated balance sheets: Current liabilities $ (1,824 ) $ (1,791 ) $ (4,015 ) $ (4,182 ) Noncurrent liabilities (93,962 ) (88,080 ) (29,322 ) (31,289 ) Funded status $ (95,786 ) $ (89,871 ) $ (33,337 ) $ (35,471 ) The accumulated benefit obligation for all defined benefit pension plans is determined using the actuarial present value and was $379.5 million and $375.5 million at December 31, 2016 and 2015, respectively. PENSION ASSETS We utilize formal investment policy guidelines for our company-sponsored pension plan assets. Management insures that the investment policy and guidelines are adhered to and the investment objectives are met. The general policy states that plan assets will be invested to seek the greatest return consistent with the fiduciary character of the pension funds and to allow the plans to meet the need for timely pension benefit payments. The specific investment guidelines stipulate that management will maintain adequate liquidity for meeting expected benefit payments by reviewing, on a timely basis, contribution and benefit payment levels and appropriately revise long-term and short-term asset allocations. Management takes reasonable and prudent steps to preserve the value of pension fund assets and to avoid the risk of large losses. Major steps taken to provide this protection include the following: • Assets are diversified among various asset classes, such as domestic equities, global equities, fixed income, convertible securities and liquid reserves. The long-term asset allocation ranges are as follows: Domestic and international equities 24% - 48% Fixed income securities 38% - 58% Alternatives, which may include equities and fixed income securities 12% - 18% Cash 0% - 5% • Periodic reviews of allocations within these ranges are made to determine what adjustments should be made based on changing economic and market conditions and specific liquidity requirements. • Assets are managed by professional investment managers and may be invested in separately managed accounts or commingled funds. Assets are diversified by selecting different investment managers for each asset class and by limiting assets under each manager to no more than 25% of the total pension fund. • Assets are not invested in Potlatch stock. The investment guidelines also provide that the individual investment managers are expected to achieve a reasonable rate of return over a market cycle. Emphasis will be placed on long-term performance versus short-term market aberrations. Factors to be considered in determining reasonable rates of return include performance achieved by a diverse cross section of other investment managers, performance of commonly used benchmarks (e.g., Russell 2500 Index, Barclays Long Credit Index, Morgan Stanley Capital International Index), actuarial assumptions for return on plan investments and specific performance guidelines given to individual investment managers. The asset allocations of the pension benefit plans’ assets at December 31 by asset category are as follows: Pension Plans Asset Category 2016 2015 Domestic and international equities 36 % 35 % Fixed income securities 48 48 Other (includes cash and equivalents and alternatives) 16 17 Total 100 % 100 % The pension assets are stated at fair value. Refer to Note 10. Financial Instruments Following is a description of the valuation methodologies used for assets measured at fair value: • Cash and cash equivalents are classified as Level 1. Corporate common and preferred stocks with quoted market prices on major securities markets are classified as Level 1. Investments in registered investment company funds for which market quotations are generally readily available on the primary market or exchange on which they are traded, and are classified in Level 1. • Level 2 assets consist primarily of collective investment trust funds, which are valued at their respective net asset value (NAV) and fully redeemable in the near-term. • Investments in funds that may not be fully redeemed in the near-term are generally classified in Level 3. We had no Level 3 investments at December 31, 2016 or 2015. Fair value measurements are as follows: (Dollars in thousands) December 31, 2016 Asset Category Level 1 Level 2 Total Cash and cash equivalents $ 2,845 $ — $ 2,845 Domestic equity securities 1 25,409 26,279 51,688 International equity securities 2 — 26,555 26,555 Emerging markets 3 12 26,391 26,403 Fixed income securities 4 138,897 — 138,897 Alternatives 5 — 43,287 43,287 Total $ 167,163 $ 122,512 $ 289,675 (Dollars in thousands) December 31, 2015 Asset Category Level 1 Level 2 Total Cash and cash equivalents $ 5,591 $ — $ 5,591 Domestic equity securities 1 26,253 25,619 51,872 International equity securities 2 411 25,733 26,144 Emerging markets 3 1,831 23,681 25,512 Fixed income securities 4 138,906 — 138,906 Alternatives 5 — 44,175 44,175 Total $ 172,992 $ 119,208 $ 292,200 1 Level 1 assets are managed investments in U.S. small/mid-cap equities that track the Russell 2500 Growth index or Russell 2500 Value index. Level 2 assets are collective investments, which are invested in U.S. large-cap equities that track the S&P 500. 2 3 Level 1 assets are mutual funds which are invested in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. Level 2 assets are collective investments in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. 4 5 Level 2 assets are collective investments in inflation-indexed bonds, securities of real estate companies, commodity index-linked notes, fixed income securities, foreign currencies, securities of natural resource companies, master limited partnerships, publicly listed infrastructure companies, floating-rate debt, securities of global agriculture companies and securities of global timber companies. PLAN ACTIVITY Pre-tax components of net periodic cost (benefit) recognized in our Consolidated Statements of Income Pension Plans Other Postretirement Employee Benefits (Dollars in thousands) 2016 2015 2014 2016 2015 2014 Service cost $ 6,508 $ 6,159 $ 5,081 $ 14 $ 22 $ 25 Interest cost 17,020 17,012 19,184 1,421 1,456 1,741 Expected return on plan assets (18,999 ) (20,804 ) (24,512 ) — — — Amortization of prior service cost (credit) 518 605 748 (8,877 ) (9,312 ) (9,641 ) Amortization of actuarial loss 16,339 17,937 14,451 1,717 2,047 2,186 Net periodic cost (benefit) $ 21,386 $ 20,909 $ 14,952 $ (5,725 ) $ (5,787 ) $ (5,689 ) Other amounts recognized in our Consolidated Statements of Comprehensive Income Pension Plans Other Postretirement Employee Benefits (Dollars in thousands) 2016 2015 2014 2016 2015 2014 Net amount at beginning of year $ 128,244 $ 134,261 $ 117,167 $ (13,741 ) $ (15,869 ) $ (18,447 ) Amounts arising during the period: Net loss (gain) 4,370 8,680 43,223 313 (3,777 ) (3,229 ) Taxes (1,704 ) (3,386 ) (16,857 ) (122 ) 1,473 1,259 Net amount arising during the period 2,666 5,294 26,366 191 (2,304 ) (1,970 ) Amounts reclassified during the period: Amortization of prior service (cost) credit (518 ) (605 ) (748 ) 8,877 9,312 9,641 Amortization of actuarial loss (16,339 ) (17,937 ) (14,451 ) (1,717 ) (2,047 ) (2,186 ) Taxes 6,574 7,231 5,927 (2,792 ) (2,833 ) (2,907 ) Net reclassifications during the period (10,283 ) (11,311 ) (9,272 ) 4,368 4,432 4,548 Net amount at end of year $ 120,627 $ 128,244 $ 134,261 $ (9,182 ) $ (13,741 ) $ (15,869 ) Amounts recognized in accumulated other comprehensive loss on our Consolidated Balance Sheets Pension Plans Other Postretirement Employee Benefits (Dollars in thousands) 2016 2015 2016 2015 Net loss $ 120,006 $ 127,307 $ 8,778 $ 9,634 Prior service cost (credit) 621 937 (17,960 ) (23,375 ) Net amount recognized $ 120,627 $ 128,244 $ (9,182 ) $ (13,741 ) The estimated net loss and prior service cost for the defined benefit pension plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over the next year are $15.4 million and $0.3 million, respectively. The estimated net loss and prior service credit for OPEB obligations that will be amortized from accumulated other comprehensive loss into net periodic benefit over the next year are $1.6 million and $8.9 million, respectively. EXPECTED FUNDING AND BENEFIT PAYMENTS We are not required to make contributions to our qualified pension plans in 2017. Our non-qualified pension plan and other postretirement employee benefit plans are unfunded and benefit payments are paid from our general assets. We estimate that we will make non-qualified pension plan and other postretirement employee benefit payments of $5.8 million in 2017, which are included below. Estimated future benefit payments, which reflect expected future service are as follows for the years indicated: (Dollars in thousands) Pension Plans Other Employee Benefits 2017 $ 28,846 $ 4,015 2018 $ 28,534 $ 3,727 2019 $ 28,189 $ 3,470 2020 $ 27,964 $ 3,255 2021 $ 27,609 $ 2,987 2022–2026 $ 132,424 $ 11,940 ACTUARIAL ASSUMPTIONS The weighted average assumptions used to determine the benefit obligation as of December 31 were: Pension Plans Other Postretirement Employee Benefits 2016 2015 2014 2016 2015 2014 Discount rate 4.40 % 4.65 % 4.25 % 4.10 % 4.25 % 3.90 % Rate of salaried compensation increase 3.00 % 3.00 % 3.00 % — — — The weighted average assumptions used to determine the net periodic cost (benefit) for the years ended December 31 were: Pension Plans Other Postretirement Employee Benefits 2016 2015 2014 2016 2015 2014 Discount rate 4.65 % 4.25 % 5.10 % 4.25 % 3.90 % 4.45 % Expected return on plan assets 6.50 % 6.75 % 7.50 % — — — Rate of salaried compensation increase 3.00 % 3.00 % 3.00 % — — — The discount rate used in the determination of pension and other postretirement employee benefit obligations was calculated using hypothetical bond portfolios to match the expected benefit payments under each of our pension plans and other postretirement employee benefit obligations based on bonds available at each year-end with a rating of "AA" or better. The portfolios were well-diversified over corporate industrial, corporate financial, municipal, federal and foreign government issuers. The expected return on plan assets assumption is based upon an analysis of historical long-term returns for various investment categories, as measured by appropriate indices. These indices are weighted based upon the extent to which plan assets are invested in the particular categories in arriving at our determination of a composite expected return. The expected rate of return assumption that will be used to determine net periodic cost for 2017 is 6.50%. The assumed health care cost trend rate used to calculate other postretirement employee benefit obligations as of December 31, 2016 was 7.90% for a certain group of participants under age 65 in our hourly plan and our Arkansas participants covered by a collective bargaining agreement, grading ratably to an assumption of 4.20% in 2086. A one percentage point change in the health care cost trend rates would have the following effects on our December 31, 2016 Consolidated Financial Statements (Dollars in thousands) 1% Increase 1% Decrease Effect on total service cost plus interest cost $ 3 $ (3 ) Effect on accumulated postretirement benefit obligation $ 67 $ (64 )

Equity-Based Compensation Plans

Equity-Based Compensation Plans	12 Months Ended
	Dec. 31, 2016
Share Based Compensation [Abstract]
Equity-Based Compensation Plans	NOTE 12. EQUITY-BASED COMPENSATION PLANS As of December 31, 2016, we had two stock incentive plans under which performance shares, restricted stock units (RSUs), and deferred compensation stock equivalent units were outstanding. All of these plans have received shareholder approval. We were originally authorized to issue up to 1.6 million shares and 1.0 million shares under our 2005 Stock Incentive Plan and 2014 Stock Incentive Plan, respectively. At December 31, 2016, approximately 1.1 million shares were authorized for future use. We issue new shares of common stock to settle performance shares, restricted stock units and deferred compensation stock equivalent units. The following table details our compensation expense and the related income tax benefit as of December 31: (Dollars in thousands) 2016 2015 2014 Employee equity-based compensation expense: Performance shares $ 3,437 $ 3,877 $ 3,515 Restricted stock units 953 881 622 Total employee equity-based compensation expense $ 4,390 $ 4,758 $ 4,137 Deferred compensation stock equivalent units expense $ 732 $ 376 $ 345 Total tax benefit recognized for shared-based payment awards $ 317 $ 319 $ 280 PERFORMANCE SHARES Performance share awards granted under the stock incentive plans have a three-year performance period and shares are issued at the end of the period if the performance measures are met. The performance measures are based on the percentile ranking of our total shareholder return relative to the total shareholder return performance of both a selected peer group of companies and a larger group of indexed companies over the three-year performance period. The number of shares actually issued, as a percentage of the amount subject to the performance share award, could range from 0% to 200%. Performance share awards granted under our stock incentive plans do not have voting rights unless and until shares are issued upon settlement. If shares are issued at the end of the three-year performance measurement period, the recipients will receive dividend equivalents in the form of additional shares at the time of payment equal to the dividends that would have been paid on the shares earned had the recipients owned the shares during the three-year period. Therefore, the shares are not considered participating securities. A Monte Carlo simulation method is used to estimate the stock prices of Potlatch and the selected peer companies at the end of the three-year performance period. The expected volatility of each company’s stock price and covariance of returns among the peer companies are key assumptions within the Monte Carlo simulation. Historical volatility over a term similar to the performance period is considered a reasonable proxy for forecasted volatility. Likewise, because the returns of Potlatch and the peer group companies are correlated, the covariance, a measure of how two variables tend to move together, is calculated over a historical term similar to the performance period and applied in the simulations. The simulations use the stock prices of Potlatch and the peer group of companies as of the award date as a starting point. Multiple simulations are generated, resulting in share prices and total shareholder return values for Potlatch and the peer group of companies. For each simulation, the total shareholder return of Potlatch is ranked against that of the peer group of companies. The future value of the performance share unit is calculated based on a multiplier for the percentile ranking and then discounted to present value. The discount rate is the risk-free rate as of the award date for a term consistent with the performance period. Awards are also credited with dividend equivalents at the end of the performance period, and as a result, award values are not adjusted for dividends. The following table presents the key inputs used in calculating the fair value of the performance share awards in 2016, 2015 and 2014, and the resulting fair values: 2016 2015 2014 Stock price as of valuation date $ 25.92 $ 40.00 $ 39.76 Risk-free rate 0.88 % 1.07 % 0.72 % Expected volatility 23.82 % 21.09 % 26.29 % Expected dividends 5.79 % 3.75 % 3.52 % Expected term (years) 3.00 3.00 3.00 Fair value of a performance share $ 30.02 $ 36.71 $ 45.57 The following table summarizes outstanding performance share awards as of December 31, 2016, 2015 and 2014, and the changes during those years: 2016 2015 2014 (Dollars in thousands, except per share amounts) Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Unvested shares outstanding at January 1 161,049 $ 41.26 160,233 $ 53.86 155,814 $ 48.73 Granted 125,469 $ 30.02 78,974 $ 36.71 87,441 $ 45.57 Vested (82,730 ) $ 45.57 (77,078 ) $ 62.78 (76,202 ) $ 34.24 Forfeited — $ — (1,080 ) $ 41.29 (6,820 ) $ 49.75 Unvested shares outstanding at December 31 203,788 $ 32.59 161,049 $ 41.26 160,233 $ 53.86 Total grant date fair value of share awards vested during the year $ 3,770 $ 4,839 $ 2,609 Aggregate intrinsic value of unvested share awards at December 31 $ 8,488 $ 4,697 $ 6,709 As of December 31, 2016, there was $3.4 million of unrecognized compensation cost related to unvested performance share awards, which is expected to be recognized over a weighted average period of 1.6 years. RESTRICTED STOCK UNITS Our 2005 Stock Incentive Plan and 2014 Stock Incentive Plan also allow for awards to be issued in the form of RSU grants. During 2016, 2015 and 2014, certain officers and other employees of the company were granted RSU awards that will accrue dividend equivalents based on dividends paid during the RSU vesting period. The dividend equivalents will be converted into additional RSUs that will vest in the same manner as the underlying RSUs to which they relate. Therefore, the shares are not considered participating securities. The terms of the awards state that the RSUs will vest in a given time period of one to three years, and the terms of certain awards follow a vesting schedule within the given time period. The following table summarizes outstanding RSU awards as of December 31, 2016, 2015 and 2014, and the changes during those years: 2016 2015 2014 (Dollars in thousands, except per share amounts) Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Unvested shares outstanding at January 1 44,531 $ 40.95 32,455 $ 42.24 37,461 $ 38.69 Granted 43,320 $ 26.08 27,820 $ 39.99 19,599 $ 40.51 Vested (16,431 ) $ 39.92 (15,385 ) $ 44.50 (21,333 ) $ 34.46 Forfeited — $ — (359 ) $ 40.27 (3,272 ) $ 42.06 Unvested shares outstanding at December 31 71,420 $ 31.61 44,531 $ 40.95 32,455 $ 42.24 Total grant date fair value of RSU awards vested during the year $ 656 $ 289 $ 735 Aggregate intrinsic value of unvested RSU awards at December 31 $ 2,975 $ 1,347 $ 1,359 As of December 31, 2016, there was $1.1 million of total unrecognized compensation cost related to outstanding RSU awards, which is expected to be recognized over a weighted average period of 1.3 years. DEFERRED COMPENSATION STOCK EQUIVALENT UNITS A long-term incentive award is granted annually to our directors, and payable upon a director's separation from service. Directors may also elect to defer their annual retainers, payable in the form of stock. All stock unit equivalent accounts are credited with dividend equivalents. As of December 31, 2016, there were 161,297 shares outstanding that will be distributed in the future to directors as common stock. Issuance of restricted stock units awarded to certain officers and employees may also be deferred. All stock unit equivalent accounts are credited with dividend equivalents. As of December 31, 2016, there were 72,127 RSUs which had vested, but issuance of the related stock had been deferred.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 13. INCOME TAXES As a REIT, we generally are not subject to federal and state corporate income taxes on income from investments in real estate that we distribute to our shareholders. We are required to pay federal and state corporate income taxes on income from our non-real estate investments which are held in taxable REIT subsidiaries (TRS). These activities are principally comprised of our wood products manufacturing operations and certain real estate investments held for sale. As of January 1, 2016, we are no longer subject to corporate income taxes on built-in gains, the excess of fair market value over tax basis, on sales of real property held at the time of our REIT conversion. Income tax expense consists of the following for the years ended December 31: (Dollars in thousands) 2016 2015 2014 Current $ (6,178 ) $ 128 $ 21,205 Deferred 2,143 1,097 (2,143 ) Net operating loss carryforwards (290 ) (6,793 ) 625 Income tax (benefit) provision $ (4,325 ) $ (5,568 ) $ 19,687 Income tax expense differs from the amount computed by applying the statutory federal income tax rate of 35% to income before income taxes due to the following for the years ended December 31: (Dollars in thousands) 2016 2015 2014 U.S. federal statutory income tax $ 2,314 $ 9,151 $ 38,359 REIT income not subject to federal income tax (7,199 ) (14,110 ) (16,812 ) Intercompany profit-in-inventory elimination adjustment 1,465 — — Change in valuation allowance 162 488 (1,818 ) State income taxes, net of federal income tax (740 ) (838 ) 2,234 Domestic production activities deduction (2 ) — (1,055 ) Permanent book-tax differences (218 ) (70 ) (1,073 ) Research and development credits (689 ) — — All other items 582 (189 ) (148 ) Income tax provision (benefit) $ (4,325 ) $ (5,568 ) $ 19,687 Effective tax rate (65.4 %) (21.3 %) 18.0 % The tax effects of significant temporary differences creating deferred tax assets and liabilities at December 31 were: (Dollars in thousands) 2016 2015 Deferred tax assets: Pensions $ 37,423 $ 35,066 Other postretirement employee benefits 13,002 13,834 Net operating loss carryforwards 983 6,935 Inventories 443 2,325 Tax credits 2,207 2,123 Nondeductible accruals 2,067 2,041 Incentive compensation 1,643 2,009 Employee benefits 1,444 1,769 Other 120 116 Total deferred tax assets 59,332 66,218 Valuation allowance (650 ) (488 ) Deferred tax assets, net of valuation allowance 58,682 65,730 Deferred tax liabilities: Timber and timberlands, net (2,165 ) (5,010 ) Property, plant and equipment, net (14,018 ) (14,120 ) Other (448 ) — Total deferred tax liabilities (16,631 ) (19,130 ) Net deferred tax assets $ 42,051 $ 46,600 As of December 31, 2016, we have no federal net operating loss carryforwards, state net operating loss carryforwards of $21.6 million that expire from 2017 through 2036 and Idaho Investment Tax Credits of $3.4 million that expire from 2017 through 2030. We use the flow-through method of accounting for investment tax credits. With the exception of the valuation allowance discussed below, we believe it is more likely than not that we will have sufficient future taxable income to realize our deferred tax assets. The valuation allowance on our deferred tax assets increased during 2016 by $0.2 million, and was $0.7 million as of December 31, 2016. The valuation allowance is related to certain Idaho Investment Tax Credit carryforwards we expect will expire prior to realization. During 2015, the valuation allowance increased from zero to $0.5 million due to the actual use and expected future use of certain Idaho Investment Tax Credits. The following table summarizes the tax years subject to examination by major taxing jurisdictions: Jurisdiction Years Federal 2013 — 2016 Arkansas 2013 — 2016 Michigan 2012 — 2016 Minnesota 2012 — 2016 Idaho 2013 — 2016 As of December 31, 2016, our 2015 TRS federal income tax return is under examination. We do not expect the outcome of the examination to have a material effect on our Consolidated Financial Statements. As of December 31, 2016, we had $0.9 million of unrecognized benefits which, if recognized, would impact the effective tax rate. There were no unrecognized benefits at December 31, 2015 and 2014. We do not currently believe there is a reasonable possibility that the amounts of unrecognized tax benefits will significantly increase or decrease in the next 12 months. A reconciliation of the beginning and ending unrecognized tax benefits is as follows: (Dollars in thousands) 2016 Balance at January 1 $ — Additions for tax positions of prior years 850 Balance at December 31 $ 850 We reflect accrued interest related to tax obligations, as well as penalties, in our provision for income taxes. For the years ended December 31, 2016, 2015 and 2014, we recognized insignificant amounts related to interest and penalties in our tax provision. At December 31, 2016 and 2015, we had insignificant amounts of accrued interest related to tax obligations and no accrued interest receivable with respect to open tax refunds.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 14. COMMITMENTS AND CONTINGENCIES OPERATING LEASES We have operating leases primarily for office space, equipment and vehicles expiring at various dates through 2033. We expect that most leases will be renewed or replaced in the normal course of business as they expire. As of December 31, 2016, the future minimum rental payments required under our operating leases are as follows: (Dollars in thousands) 2017 $ 4,383 2018 3,638 2019 2,558 2020 1,878 2021 1,310 2022 and thereafter 1,426 Total $ 15,193 Operating lease expense was $4.2 million, $4.6 million and $4.0 million for the years ended December 31, 2016, 2015 and 2014, respectively. LEGAL MATTERS In January 2007, the Environmental Protection Agency (EPA) notified us that we are a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA) and the Clean Water Act for cleanup of a site known as Avery Landing in northern Idaho. We own a portion of the land at the Avery Landing site, which we acquired in 1980 from the Milwaukee Railroad. The land we own at the site and adjacent properties were contaminated with petroleum as a result of the Milwaukee Railroad's operations at the site prior to 1980. On July 5, 2011, the EPA issued an Action Memorandum for the Avery Landing Site selecting contaminant extraction and off-site disposal as the remedial alternative. On May 23, 2012, we signed a consent order with the EPA pursuant to which we agreed to provide $1.75 million in funding for EPA cleanup on a portion of our property (including the adjacent riverbank owned by the Idaho Department of Lands). The EPA cleanup was completed in October 2012. On April 4, 2013, the EPA issued a unilateral administrative order requiring us to remediate the portion of the Avery Landing site that we own. Our remediation was completed in October 2013. On September 25, 2015, the EPA sent us a letter asserting that the EPA and the Department of Transportation (the current owner of a portion of the adjacent property remediated by the EPA) (DOT) had incurred $9.8 million in unreimbursed response costs associated with the site and that we were liable for such costs. We believe we have meritorious defenses to this claim and we intend to defend ourselves vigorously. We have reserved all of our rights to seek reimbursement for the costs of remediation from all parties potentially responsible. We have executed a tolling agreement with the EPA and DOT suspending the statute of limitations on the claim until September 2016 in order to facilitate negotiations of a final settlement and release. In September, the parties agreed to extend the tolling agreement through October 6, 2016. The tolling agreement was further extended through February 22, 2017 and in January 2017, the tolling agreement was extended through May 22, 2017. Settlement negotiations continue. We accrued $0.2 million for this matter in the first quarter of 2016 and an additional $0.8 million for this matter in the second quarter of 2016. While it is reasonably possible that we may incur an additional liability in respect to this claim, we are unable to estimate at this time the amount of charges, if any, which may be required for this matter in the future.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2016
Segment Reporting Information Additional Information [Abstract]
Segment Information	NOTE 15. SEGMENT INFORMATION Our businesses are organized into three reportable operating segments: Resource, Wood Products and Real Estate. Management activities include planting and harvesting trees and building and maintaining roads. The Resource segment also generates revenues from non-timber resources such as hunting leases, recreation permits and leases, mineral rights leases, biomass production and carbon sequestration. The Wood Products segment manufactures and markets lumber and plywood. The business of our Real Estate segment consists primarily of the sale of land holdings deemed non-strategic or identified as having higher and better use alternatives. The Real Estate segment engages in limited real estate subdivision activities through Potlatch TRS. The reporting segments follow the same accounting policies used for our Consolidated Financial Statements The following table presents business segment information for each of the past three years. Corporate information is included to reconcile segment data to the Consolidated Financial Statements (Dollars in thousands) 2016 2015 2014 Revenues: Resource $ 256,163 $ 263,875 $ 252,581 Wood Products 367,426 336,214 376,239 Real Estate 32,604 28,989 40,460 656,193 629,078 669,280 Intersegment Resource revenues 1 (57,094 ) (53,742 ) (62,330 ) Total consolidated revenues $ 599,099 $ 575,336 $ 606,950 Income (loss) before income taxes: Resource $ 81,918 $ 76,350 $ 84,976 Wood Products 24,587 (5,235 ) 52,442 Real Estate 2 (29,495 ) 16,849 26,945 Eliminations and adjustments (3,001 ) 3,283 (190 ) 74,009 91,247 164,173 Corporate (38,455 ) (32,340 ) (31,667 ) Operating income 35,554 58,907 132,506 Interest expense, net (28,941 ) (32,761 ) (22,909 ) Income before income taxes $ 6,613 $ 26,146 $ 109,597 Depreciation, depletion and amortization: Resource $ 24,090 $ 28,807 $ 17,847 Wood Products 7,357 6,810 6,176 Real Estate 4 56 59 31,451 35,673 24,082 Corporate 760 951 1,307 Bond discount and deferred loan fees 1,979 1,481 1,360 Total depreciation, depletion and amortization $ 34,190 $ 38,105 $ 26,749 Basis of real estate sold: Real Estate $ 8,518 $ 7,394 $ 9,355 Elimination and adjustments (507 ) (382 ) (709 ) Total basis of real estate sold $ 8,011 $ 7,012 $ 8,646 Assets: Resource and Real Estate 3 $ 662,852 $ 837,630 $ 847,873 Wood Products 150,855 131,103 118,674 813,707 968,733 966,547 Corporate 113,974 47,879 65,199 Total consolidated assets $ 927,681 $ 1,016,612 $ 1,031,746 Capital Expenditures: 4 Resource $ 13,311 $ 13,497 $ 10,985 Wood Products 5,491 18,482 12,551 Real Estate 111 184 131 18,913 32,163 23,667 Corporate 375 569 565 Total capital expenditures $ 19,288 $ 32,732 $ 24,232 1 2 3 Assets are shown on a combined basis for the Resource and Real Estate segments, as we do not report assets separately to management for these segments. 4 Excludes the acquisition of timber and timberlands. All of our wood products facilities and all other assets are located within the continental United States. Geographic information regarding our revenues is as follows: (Dollars in thousands) 2016 2015 2014 United States $ 597,899 $ 573,398 $ 601,738 Canada 173 851 2,618 Mexico 1,027 919 2,594 Other — 168 — Total consolidated revenues $ 599,099 $ 575,336 $ 606,950 One customer within our Resource segment accounted for slightly more than 10% of our total consolidated revenues in the years ended December 31, 2016, 2015 and 2014.

Financial Results by Quarter (U

Financial Results by Quarter (Unaudited)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Data [Abstract]
Financial Results by Quarter (Unaudited)	NOTE 16. FINANCIAL RESULTS BY QUARTER (UNAUDITED) Three Months Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share amounts) 2016 2015 2016 2015 2016 2015 2016 2015 Revenues $ 127,896 $ 134,125 $ 141,495 $ 128,747 $ 174,027 $ 174,475 $ 155,681 $ 137,989 Operating income (loss) $ 5,072 $ 14,027 $ (34,228 ) $ 7,311 $ 38,994 $ 27,714 $ 25,716 $ 9,855 Net income (loss) $ 157 $ 5,656 $ (31,238 ) $ 711 $ 27,646 $ 21,798 $ 14,373 $ 3,549 Net income (loss) per share 1 Basic $ — $ 0.14 $ (0.77 ) $ 0.02 $ 0.68 $ 0.53 $ 0.35 $ 0.09 Diluted $ — $ 0.14 $ (0.77 ) $ 0.02 $ 0.68 $ 0.53 $ 0.35 $ 0.09 1 Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year. As disclosed in Note 1: Summary of Significant Accounting Policies The adjustments made to the financial statements reported at interim periods during 2016 are as follows: CONSOLIDATED BALANCE SHEETS March 31 June 30 September 30 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Cash and cash equivalents $ — $ 7,824 $ 7,824 $ — $ 65,378 $ 65,378 $ — $ 72,855 $ 72,855 Cash $ 7,789 $ (7,789 ) $ — $ 25,301 $ (25,301 ) $ — $ 32,734 $ (32,734 ) $ — Short-term investments $ 35 $ (35 ) $ — $ 40,077 $ (40,077 ) $ — $ 40,121 $ (40,121 ) $ — CONSOLIDATED STATEMENTS OF CASH FLOWS March 31 June 30 September 30 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Change in short-term investments $ 4 $ (4 ) $ — $ (40,038 ) $ 40,038 $ — $ (40,082 ) $ 40,082 $ — Net cash from investing activities $ (3,054 ) $ (4 ) $ (3,058 ) $ 61,338 $ 40,038 $ 101,376 $ 56,040 $ 40,082 $ 96,122 Change in cash and cash equivalents $ (97 ) $ (4 ) $ (101 ) $ 17,415 $ 40,038 $ 57,453 $ 24,848 $ 40,082 $ 64,930 Cash and cash equivalents at beginning of year $ 7,886 $ 39 $ 7,925 $ 7,886 $ 39 $ 7,925 $ 7,886 $ 39 $ 7,925 Cash and cash equivalents at end of year $ 7,789 $ 35 $ 7,824 $ 25,301 $ 40,077 $ 65,378 $ 32,734 $ 40,121 $ 72,855

Summary of Significant Accoun26

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
General	GENERAL We are primarily engaged in activities associated with timberland management, including the sale of timber, the management of approximately 1.4 million acres of timberlands and the purchase and sale of timberlands. We are also engaged in the manufacture and sale of wood products. Our timberlands and all of our wood products facilities are located within the continental United States. The primary market for our products is the United States. We converted to a Real Estate Investment Trust (REIT) effective January 1, 2006.
Consolidation	CONSOLIDATION The Consolidated Financial Statements
Significant Estimates	SIGNIFICANT ESTIMATES The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America, which we refer to in this report as U.S. GAAP, requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and assumptions. Significant estimates include timber volumes, income projections and tax planning strategies used to support realization of deferred tax assets, environmental liabilities, pension and postretirement obligation assumptions, the fair value of derivative instruments and assumptions utilized for asset and disposal group impairment tests. These significant estimates are described in further detail below.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents are investments that are highly liquid with maturities of three months or less.
Short Term Investments	SHORT-TERM INVESTMENTS We classify our short-term investments as “available for sale.” All short-term investments of REIT funds are made in compliance with the requirements of the Internal Revenue Code with respect to qualifying REIT investments.
Inventories	INVENTORIES The last-in, first-out method is used to determine the cost of logs, lumber and plywood for most of our operations. The average cost method is used to determine the cost of all other inventories. Inventories are stated at the lower of cost or net realizable value. Expenses associated with idle capacity or other curtailments of production are reflected in cost of goods sold in the periods incurred.
Property, Plant and Equipment	PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment are valued at cost less accumulated depreciation. Depreciation of buildings, equipment and other depreciable assets is determined using the straight-line method of depreciation. Major improvements and replacements of property are capitalized. Maintenance, repairs and minor improvements and replacements are expensed. Upon retirement or other disposition of property, applicable cost and accumulated depreciation are removed from the accounts. Any gains or losses are included in earnings.
Timber and Timberlands	TIMBER AND TIMBERLANDS Timber and timberlands are valued at cost less accumulated depletion and amortization. We capitalize costs related to stand establishment, which include the preparation of the land for planting, seeds or seedlings and tree planting costs, which include third-party labor costs, materials and other contract services. Upon completion of planting activities and field inspection to confirm the planting operation was successful, a plantation will be considered “established.” Subsequent expenditures to maintain the integrity or enhance the growth of an established plantation or stand are expensed. Post-establishment expenses include vegetation control, fertilization, thinning operations and the replanting of seedlings lost through mortality. Forest management costs are considered current operating expenses and include property taxes and insurance, silviculture costs incurred subsequent to stand establishment, cruising (physical inventory), property maintenance, salaries, supplies, travel, record-keeping, fire protection and other normal recurring administrative personnel costs. Timberland acquisitions are capitalized based on the relative appraised values of timberland, merchantable sawlogs, merchantable pulpwood, pre-production (young growth not yet merchantable), logging roads and other land improvements. The aggregate estimated volume of current standing merchantable timber inventory, which is a component of calculating our depletion rates, is updated at least annually to reflect increases due to the reclassification of young growth to merchantable timber when the young growth meets defined diameter specifications, the annual growth of merchantable timber and the acquisition of additional merchantable timber and to reflect decreases due to timber harvests and land sales. Timber volumes are estimated from cruises of the timber tracts, which are completed on our timberlands on approximately a five to ten year cycle. Individual cruises are compiled to create a growth projection model. Depletion represents the amount charged to expense as fee timber is harvested. Rates at which timber is depleted are calculated annually for each of our depletion pools by dividing the beginning of year balance of the merchantable timber accounts by the forest inventory volume, after inventory updates for growth projection adjustments and new timber cruises. The base cost of logging roads, such as clearing, grading and ditching, is not amortized and remains a capitalized item until obliteration or other disposition. Other portions of the initial logging road cost, such as bridges, culverts and gravel surfacing are amortized over their useful lives, which range from 5 to 20 years. Costs associated with temporary logging road spurs are expensed as incurred.
Real Estate Sales	REAL ESTATE SALES Sales of non-core timberland are considered to be part of our normal operations. We therefore classify revenue and costs associated with real estate sold in revenues and cost of goods sold, respectively, in our Consolidated Statements of Income Consolidated Statements of Cash Flows . The sale of large parcels of property, such as our sale of central Idaho, that do not represent our core operations and are of such a size as to not be indicative of our ongoing operations, are presented as a net gain or loss in our Consolidated Statements of Income Consolidated Statements of Cash Flows .
Long-Lived Assets	LONG-LIVED ASSETS Our long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable, as measured by its undiscounted estimated future cash flows. We use our operational budgets to estimate future cash flows. The estimates are adjusted periodically to reflect changing business conditions. Impaired assets are written down to fair value. Assets to be disposed of are reported at the lower of carrying amount or fair value less cost to sell. We recognize a liability and an asset equal to the fair value of our legal obligations to perform asset retirement activities if the amount can be reasonably estimated. We review these obligations annually and do not expect them to have a material effect on our financial position, results of operations or cash flows.
Income Taxes	INCOME TAXES We use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases, operating loss carryforwards and tax credit carryforwards. Deferred tax assets and liabilities are measured pursuant to tax laws using rates expected to apply to taxable income in the years in which the temporary differences are expected to be recovered or settled. We recognize the effect of a change in income tax rates on deferred tax assets and liabilities in the Consolidated Statements of Income Consolidated Statements of Comprehensive Income
Revenue Recognition	REVENUE RECOGNITION We recognize revenue from the sale of timber when risk of loss transfers to the buyer and the quantity sold is determinable. These sales usually take the form of delivered logs, pay-as-cut stumpage contracts, lump sum stumpage contracts or timber deeds. On delivered log sales, revenue includes amounts billed for logging and hauling and is recognized at the point the logs are delivered and scaled. Revenue is recognized on timber deeds and lump sum stumpage contracts generally upon closing or when the contracts are effective, which is the point at which the buyer assumes risk of loss associated with the standing timber. We recognize revenue from the sale of manufactured wood products and residual by-products when there is persuasive evidence of a sales agreement, the price to the customer is fixed and determinable, collection is reasonably assured and title and the risk of loss passes to the customer. Shipping terms generally indicate when title and the risk of loss have passed. Revenue is recognized at shipment when shipping terms are FOB (free on board) shipping point. For sales where shipping terms are FOB destination, revenue is recognized when the goods are received by the customer. We receive cash consideration in full and recognize revenue at closing on substantially all of our real estate sales. While sales taxes are not typical, in the event sales taxes are collected, revenue is recognized net of any sales tax and sales taxes are recorded as a current liability and remitted to the appropriate governmental entities. Costs for shipping and handling are included in cost of goods sold in our Consolidated Statements of Income
Equity-Based Compensation	EQUITY-BASED COMPENSATION Equity-based awards are measured at fair value on the dates they are granted or modified. These measurements establish the cost of the equity-based awards for accounting purposes. The cost of the equity-based award is then recognized in the Consolidated Statements of Income Note 12: Equity-Based Compensation Plans
Reclassifications	Reclassifications We have historically classified money market funds and interest bearing cash as short-term investments. During the fourth quarter of 2016, money market funds and interest bearing cash accounts previously classified as short-term investment balances, which are highly liquid and have maturities of three months or less, have been reclassified to cash equivalents. We believe the change is preferable, as aggregating cash and cash equivalents more clearly reflects the substance of our use of money market funds and interest bearing cash accounts as a cash management tool and not as part of an investment strategy. In addition, the presentation is comparable to industry peer companies. There is no change to income from continuing operations, comprehensive income, total current assets, total assets, or stockholders’ equity. This change has been reported through a retrospective application of the new policy to all periods presented. A summary of the adjustments are presented below. See Note 16: Financial Results by Quarter (unaudited ) Consolidated Balance Sheets 2015 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Cash and cash equivalents $ — $ 7,925 $ 7,925 Cash $ 7,886 $ (7,886 ) $ — Short-term investments $ 39 $ (39 ) $ — Consolidated Statement of Cash Flows 2015 2014 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Change in short-term investments $ 26,329 $ (19,334 ) $ 6,995 $ 25,883 $ (24,073 ) $ 1,810 Net cash from investing activities $ (14,255 ) $ (19,334 ) $ (33,589 ) $ (382,683 ) $ (24,073 ) $ (406,756 ) Change in cash and cash equivalents $ 3,242 $ (19,334 ) $ (16,092 ) $ (942 ) $ (24,073 ) $ (25,015 ) Cash and cash equivalents at beginning of year $ 4,644 $ 19,373 $ 24,017 $ 5,586 $ 43,446 $ 49,032 Cash and cash equivalents at end of year $ 7,886 $ 39 $ 7,925 $ 4,644 $ 19,373 $ 24,017
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers: Topic 606 Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date In May 2015, the FASB issued ASU No. 2015-07, Disclosures for Investments in Certain Entities that Calculate Net Asset Value per Share (or Its Equivalent) Technical Corrections and Improvements Note 11: Savings Plans, Pension Plans and Other Postretirement Employee Benefits In February 2016, the FASB issued ASU No. 2016-02, Leases, which, among other things, requires lessees to recognize most leases on the balance sheet. We have operating leases covering office space, equipment and vehicles expiring at various dates through 2033, which would require a right-of-use asset and a lease liability, initially measured at the present value of the lease payments, to be recognized in the statement of financial position. Lease costs would generally continue to be recognized on a straight-line basis. We expect our right-of-use asset and lease liability will approximate our current future minimum lease payments required under our operating leases, which were $15.2 million at December 31, 2016. The ASU is effective for us on January 1, 2019. In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which eliminates the probable recognition threshold for credit impairments. The new guidance broadens the information that an entity must consider in developing its expected credit loss estimate for assets measured either collectively or individually to include forecasted information, as well as past events and current conditions. The guidance provides no specified method for measuring expected credit losses, and an entity is allowed to apply methods that reasonably reflect its expectations of the credit loss estimate. This ASU is effective for us on January 1, 2020. Our credit loss estimates are reflected in our allowance for doubtful accounts on accounts receivables, which had a balance of $0.5 million at December 31, 2016. The adoption of this guidance is not expected to have a significant effect on our consolidated financial statements. In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory In January 2017, the FASB issued ASU 2017-1, Business Combinations (Topic 805): Clarifying the Definition of a Business

Summary of Significant Accoun27

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Reclassification Adjustments	A summary of the adjustments are presented below. See Note 16: Financial Results by Quarter (unaudited ) Consolidated Balance Sheets 2015 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Cash and cash equivalents $ — $ 7,925 $ 7,925 Cash $ 7,886 $ (7,886 ) $ — Short-term investments $ 39 $ (39 ) $ — Consolidated Statement of Cash Flows 2015 2014 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Change in short-term investments $ 26,329 $ (19,334 ) $ 6,995 $ 25,883 $ (24,073 ) $ 1,810 Net cash from investing activities $ (14,255 ) $ (19,334 ) $ (33,589 ) $ (382,683 ) $ (24,073 ) $ (406,756 ) Change in cash and cash equivalents $ 3,242 $ (19,334 ) $ (16,092 ) $ (942 ) $ (24,073 ) $ (25,015 ) Cash and cash equivalents at beginning of year $ 4,644 $ 19,373 $ 24,017 $ 5,586 $ 43,446 $ 49,032 Cash and cash equivalents at end of year $ 7,886 $ 39 $ 7,925 $ 4,644 $ 19,373 $ 24,017

Earnings per Share (Tables)

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Earnings Per Share Basic Other Disclosures [Abstract]
Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted EPS	The following table reconciles the number of shares used in calculating the basic and diluted earnings per share for the years ended December 31: (Dollars in thousands, except per share amounts) 2016 2015 2014 Net income $ 10,938 $ 31,714 $ 89,910 Basic weighted-average shares outstanding 40,797,806 40,842,126 40,748,924 Incremental shares due to: Performance shares 200,164 122,334 117,830 Restricted stock units 35,470 23,359 27,628 Diluted weighted-average shares outstanding 41,033,440 40,987,819 40,894,382 Basic net income per share $ 0.27 $ 0.78 $ 2.21 Diluted net income per share $ 0.27 $ 0.77 $ 2.20

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Schedule of inventory	(Dollars in thousands) 2016 2015 Logs $ 23,342 $ 9,920 Lumber, plywood and veneer 20,500 16,932 Materials and supplies 8,780 8,310 $ 52,622 $ 35,162 Valued at lower of cost or net realizable value: Last-in, first-out basis $ 29,769 $ 16,686 Average cost basis 22,853 18,476 Total inventories $ 52,622 $ 35,162

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Schedule of Property, Plant and Equipment	(Dollars in thousands) Range of useful lives 2016 2015 Land $ 4,712 $ 4,736 Buildings and improvements 10-40 years 54,448 54,362 Machinery and equipment 2-25 years 190,316 189,428 Construction in progress 1,437 224 250,913 248,750 Less: accumulated depreciation (178,093 ) (173,465 ) Total property, plant and equipment, net $ 72,820 $ 75,285

Timber and Timberlands(Tables)

Timber and Timberlands(Tables)	12 Months Ended
	Dec. 31, 2016
Timber And Timberlands [Abstract]
Schedule of Timber and Timberlands	(Dollars in thousands) 2016 2015 Timber and timberlands $ 572,273 $ 745,634 Logging roads 69,583 70,965 Total timber and timberlands, net $ 641,856 $ 816,599
Schedule of Future Payments Due Under Timber Cutting Contracts	Future payments due under timber cutting contracts as of December 31, 2016 are as follows: (Dollars in thousands) 2017 $ 6,741 2018 5,275 2019 1,604 2020 32 2021 275 Total $ 13,927

Current Other Assets (Tables)

Current Other Assets (Tables)	12 Months Ended
	Dec. 31, 2016
Other Assets [Abstract]
Schedule of Current Other Assets	(Dollars in thousands) 2016 2015 Real estate held for sale $ 9,184 $ 12,708 Prepaid expenses 1,939 1,531 Interest rate swaps 32 7 Total current other assets $ 11,155 $ 14,246

Accounts Payable and Accrued 33

Accounts Payable and Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2016
Accounts Payable And Accrued Liabilities Current And Noncurrent [Abstract]
Schedule of Accounts Payable and Accrued Liabilities	(Dollars in thousands) 2016 2015 Accrued payroll and benefits $ 13,634 $ 9,509 Accounts payable 8,382 6,351 Accrued interest 6,237 6,797 Accrued taxes 4,956 5,304 Other current liabilities 10,501 11,779 Total accounts payable and accrued liabilities $ 43,710 $ 39,740

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	(Dollars in thousands) 2016 2015 Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 $ 349,500 $ 322,000 Senior notes, 7.50% due 2019 150,000 150,000 Revenue bonds, 2.75% due 2024 65,735 108,335 Medium-term notes, 8.75% to 8.89%, due 2017 through 2022 22,250 27,250 Long-term principal 587,485 607,585 Interest rate swaps 247 581 Less debt issuance costs (3,015 ) (3,037 ) Less unamortized discounts (729 ) (1,248 ) Total long-term debt (includes current portion) 583,988 603,881 Less current portion of long-term debt (11,032 ) (5,007 ) Long-term debt $ 572,956 $ 598,874
Schedule of Maturities of Long-term Debt	Scheduled principal payments due on long-term debt as of December 31, 2016 are as follows: (Dollars in thousands) 2017 $ 11,000 2018 14,250 2019 190,000 2020 46,000 2021 40,000 Thereafter 286,235 Total $ 587,485

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Derivative Instrument Detail [Abstract]
Fair Value of Cash Flow and Fair Value Derivative Instruments	The fair values of our cash flow and fair value derivative instruments on our Consolidated Balance Sheets (Dollars in thousands) Asset Derivatives Liability Derivatives Location 2016 2015 Location 2016 2015 Other assets, current $ 32 $ 7 $ — $ — Other assets, non-current 1,363 574 Long-term debt 91 — $ 1,395 $ 581 $ 91 $ —
Effect of Derivatives on Consolidated Statements of Income	The following table details the effect of derivatives on our Consolidated Statements of Income (Dollars in thousands) Location 2016 2015 2014 Derivatives Realized gain on interest rate contracts 1 Interest $ 805 $ 1,534 $ 979 Derivatives Gain (loss) recognized in other comprehensive income, net of tax (effective portion) $ (916 ) $ — $ — Loss reclassified from accumulated other comprehensive income into interest expense (effective portion) 1 Interest 215 — — Net effect on other comprehensive income $ (701 ) $ — $ — 1 Realized gains and losses on interest rate contracts consist of net cash received or paid and interest accruals on the interest rate swaps during the periods. Net cash received or paid is included in the supplemental cash flow information within interest, net of amounts capitalized in the Consolidated Statements of Cash Flows .

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Derivative Instrument Detail [Abstract]
Estimated Fair Value of Financial Instruments	Estimated fair values of our financial instruments as of December 31 are as follows: 2016 2015 (Dollars in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Cash and cash equivalents (Level 1) $ 82,584 $ 82,584 $ 7,925 $ 7,925 Derivative assets related to interest rate swaps (Level 2) $ 1,395 $ 1,395 $ 581 $ 581 Derivative liabilities related to interest rate swaps (Level 2) $ (91 ) $ (91 ) $ — $ — Long-term debt, including current portion (Level 2): Term Loans $ (349,500 ) $ (350,909 ) $ (322,000 ) $ (322,000 ) Senior notes (149,271 ) (164,250 ) (149,013 ) (165,375 ) Revenue bonds (65,735 ) (62,205 ) (108,074 ) (108,454 ) Medium-term notes (22,250 ) (23,926 ) (27,250 ) (29,611 ) Total long-term debt 1 $ (586,756 ) $ (601,290 ) $ (606,337 ) $ (625,440 ) Company owned life insurance (COLI) (Level 3) $ 70 $ 70 $ 687 $ 687 1 The carrying amount of long-term debt includes principal and unamortized discounts

Savings Plans, Pension Plans 37

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2016
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Schedule of Changes in Projected Benefit Obligations	The change in benefit obligation, change in plan assets and funded status for company-sponsored benefit plans and obligations are as follows: Pension Plans Other Postretirement Employee Benefits (Dollars in thousands) 2016 2015 2016 2015 Benefit obligation at beginning of year $ (382,071 ) $ (417,694 ) $ (35,471 ) $ (41,561 ) Service cost (6,508 ) (6,159 ) (14 ) (22 ) Interest cost (17,020 ) (17,012 ) (1,421 ) (1,456 ) Actuarial gain (loss) (13,997 ) 27,094 (313 ) 3,778 Benefits paid 34,135 31,700 3,882 3,790 Benefit obligation at end of year $ (385,461 ) $ (382,071 ) $ (33,337 ) $ (35,471 ) Fair value of plan assets at beginning of year $ 292,200 $ 337,059 $ — $ — Actual return on plan assets 28,626 (14,970 ) — — Employer contributions and benefit payments 2,984 1,811 3,882 3,790 Benefits paid (34,135 ) (31,700 ) (3,882 ) (3,790 ) Fair value of plan assets at end of year $ 289,675 $ 292,200 $ — $ — Amounts recognized in the consolidated balance sheets: Current liabilities $ (1,824 ) $ (1,791 ) $ (4,015 ) $ (4,182 ) Noncurrent liabilities (93,962 ) (88,080 ) (29,322 ) (31,289 ) Funded status $ (95,786 ) $ (89,871 ) $ (33,337 ) $ (35,471 )
Schedule of Weighted Average Asset Allocations of the Pension Benefit Plans' Assets	The asset allocations of the pension benefit plans’ assets at December 31 by asset category are as follows: Pension Plans Asset Category 2016 2015 Domestic and international equities 36 % 35 % Fixed income securities 48 48 Other (includes cash and equivalents and alternatives) 16 17 Total 100 % 100 %
Schedule of Allocation of Plan Assets	Fair value measurements are as follows: (Dollars in thousands) December 31, 2016 Asset Category Level 1 Level 2 Total Cash and cash equivalents $ 2,845 $ — $ 2,845 Domestic equity securities 1 25,409 26,279 51,688 International equity securities 2 — 26,555 26,555 Emerging markets 3 12 26,391 26,403 Fixed income securities 4 138,897 — 138,897 Alternatives 5 — 43,287 43,287 Total $ 167,163 $ 122,512 $ 289,675 (Dollars in thousands) December 31, 2015 Asset Category Level 1 Level 2 Total Cash and cash equivalents $ 5,591 $ — $ 5,591 Domestic equity securities 1 26,253 25,619 51,872 International equity securities 2 411 25,733 26,144 Emerging markets 3 1,831 23,681 25,512 Fixed income securities 4 138,906 — 138,906 Alternatives 5 — 44,175 44,175 Total $ 172,992 $ 119,208 $ 292,200 1 Level 1 assets are managed investments in U.S. small/mid-cap equities that track the Russell 2500 Growth index or Russell 2500 Value index. Level 2 assets are collective investments, which are invested in U.S. large-cap equities that track the S&P 500. 2 3 Level 1 assets are mutual funds which are invested in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. Level 2 assets are collective investments in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. 4 5 Level 2 assets are collective investments in inflation-indexed bonds, securities of real estate companies, commodity index-linked notes, fixed income securities, foreign currencies, securities of natural resource companies, master limited partnerships, publicly listed infrastructure companies, floating-rate debt, securities of global agriculture companies and securities of global timber companies.
Pre-tax Components of Net Periodic Cost (Benefit)	Pre-tax components of net periodic cost (benefit) recognized in our Consolidated Statements of Income Pension Plans Other Postretirement Employee Benefits (Dollars in thousands) 2016 2015 2014 2016 2015 2014 Service cost $ 6,508 $ 6,159 $ 5,081 $ 14 $ 22 $ 25 Interest cost 17,020 17,012 19,184 1,421 1,456 1,741 Expected return on plan assets (18,999 ) (20,804 ) (24,512 ) — — — Amortization of prior service cost (credit) 518 605 748 (8,877 ) (9,312 ) (9,641 ) Amortization of actuarial loss 16,339 17,937 14,451 1,717 2,047 2,186 Net periodic cost (benefit) $ 21,386 $ 20,909 $ 14,952 $ (5,725 ) $ (5,787 ) $ (5,689 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Other amounts recognized in our Consolidated Statements of Comprehensive Income Pension Plans Other Postretirement Employee Benefits (Dollars in thousands) 2016 2015 2014 2016 2015 2014 Net amount at beginning of year $ 128,244 $ 134,261 $ 117,167 $ (13,741 ) $ (15,869 ) $ (18,447 ) Amounts arising during the period: Net loss (gain) 4,370 8,680 43,223 313 (3,777 ) (3,229 ) Taxes (1,704 ) (3,386 ) (16,857 ) (122 ) 1,473 1,259 Net amount arising during the period 2,666 5,294 26,366 191 (2,304 ) (1,970 ) Amounts reclassified during the period: Amortization of prior service (cost) credit (518 ) (605 ) (748 ) 8,877 9,312 9,641 Amortization of actuarial loss (16,339 ) (17,937 ) (14,451 ) (1,717 ) (2,047 ) (2,186 ) Taxes 6,574 7,231 5,927 (2,792 ) (2,833 ) (2,907 ) Net reclassifications during the period (10,283 ) (11,311 ) (9,272 ) 4,368 4,432 4,548 Net amount at end of year $ 120,627 $ 128,244 $ 134,261 $ (9,182 ) $ (13,741 ) $ (15,869 )
Schedule of Accumulated Other Comprehensive Income (Loss)	Amounts recognized in accumulated other comprehensive loss on our Consolidated Balance Sheets Pension Plans Other Postretirement Employee Benefits (Dollars in thousands) 2016 2015 2016 2015 Net loss $ 120,006 $ 127,307 $ 8,778 $ 9,634 Prior service cost (credit) 621 937 (17,960 ) (23,375 ) Net amount recognized $ 120,627 $ 128,244 $ (9,182 ) $ (13,741 )
Schedule of Expected Future Benefit Payments	Estimated future benefit payments, which reflect expected future service are as follows for the years indicated: (Dollars in thousands) Pension Plans Other Employee Benefits 2017 $ 28,846 $ 4,015 2018 $ 28,534 $ 3,727 2019 $ 28,189 $ 3,470 2020 $ 27,964 $ 3,255 2021 $ 27,609 $ 2,987 2022–2026 $ 132,424 $ 11,940
Weighted Average Assumptions Used to Determine the Benefit Obligation	The weighted average assumptions used to determine the benefit obligation as of December 31 were: Pension Plans Other Postretirement Employee Benefits 2016 2015 2014 2016 2015 2014 Discount rate 4.40 % 4.65 % 4.25 % 4.10 % 4.25 % 3.90 % Rate of salaried compensation increase 3.00 % 3.00 % 3.00 % — — —
Schedule of Weighted Average Assumptions Used to Determine the Net Periodic Cost (Benefit)	The weighted average assumptions used to determine the net periodic cost (benefit) for the years ended December 31 were: Pension Plans Other Postretirement Employee Benefits 2016 2015 2014 2016 2015 2014 Discount rate 4.65 % 4.25 % 5.10 % 4.25 % 3.90 % 4.45 % Expected return on plan assets 6.50 % 6.75 % 7.50 % — — — Rate of salaried compensation increase 3.00 % 3.00 % 3.00 % — — —
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates	A one percentage point change in the health care cost trend rates would have the following effects on our December 31, 2016 Consolidated Financial Statements (Dollars in thousands) 1% Increase 1% Decrease Effect on total service cost plus interest cost $ 3 $ (3 ) Effect on accumulated postretirement benefit obligation $ 67 $ (64 )

Equity-Based Compensation Pla38

Equity-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2016
Share Based Compensation [Abstract]
Details of Equity-Based Compensation Expense	The following table details our compensation expense and the related income tax benefit as of December 31: (Dollars in thousands) 2016 2015 2014 Employee equity-based compensation expense: Performance shares $ 3,437 $ 3,877 $ 3,515 Restricted stock units 953 881 622 Total employee equity-based compensation expense $ 4,390 $ 4,758 $ 4,137 Deferred compensation stock equivalent units expense $ 732 $ 376 $ 345 Total tax benefit recognized for shared-based payment awards $ 317 $ 319 $ 280
Fair Value of Performance Share Awards	The following table presents the key inputs used in calculating the fair value of the performance share awards in 2016, 2015 and 2014, and the resulting fair values: 2016 2015 2014 Stock price as of valuation date $ 25.92 $ 40.00 $ 39.76 Risk-free rate 0.88 % 1.07 % 0.72 % Expected volatility 23.82 % 21.09 % 26.29 % Expected dividends 5.79 % 3.75 % 3.52 % Expected term (years) 3.00 3.00 3.00 Fair value of a performance share $ 30.02 $ 36.71 $ 45.57
Summary of Outstanding Performance Share Awards	The following table summarizes outstanding performance share awards as of December 31, 2016, 2015 and 2014, and the changes during those years: 2016 2015 2014 (Dollars in thousands, except per share amounts) Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Unvested shares outstanding at January 1 161,049 $ 41.26 160,233 $ 53.86 155,814 $ 48.73 Granted 125,469 $ 30.02 78,974 $ 36.71 87,441 $ 45.57 Vested (82,730 ) $ 45.57 (77,078 ) $ 62.78 (76,202 ) $ 34.24 Forfeited — $ — (1,080 ) $ 41.29 (6,820 ) $ 49.75 Unvested shares outstanding at December 31 203,788 $ 32.59 161,049 $ 41.26 160,233 $ 53.86 Total grant date fair value of share awards vested during the year $ 3,770 $ 4,839 $ 2,609 Aggregate intrinsic value of unvested share awards at December 31 $ 8,488 $ 4,697 $ 6,709
Summary of Outstanding RSU Awards	The following table summarizes outstanding RSU awards as of December 31, 2016, 2015 and 2014, and the changes during those years: 2016 2015 2014 (Dollars in thousands, except per share amounts) Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Shares Weighted Average Grant Date Fair Value Unvested shares outstanding at January 1 44,531 $ 40.95 32,455 $ 42.24 37,461 $ 38.69 Granted 43,320 $ 26.08 27,820 $ 39.99 19,599 $ 40.51 Vested (16,431 ) $ 39.92 (15,385 ) $ 44.50 (21,333 ) $ 34.46 Forfeited — $ — (359 ) $ 40.27 (3,272 ) $ 42.06 Unvested shares outstanding at December 31 71,420 $ 31.61 44,531 $ 40.95 32,455 $ 42.24 Total grant date fair value of RSU awards vested during the year $ 656 $ 289 $ 735 Aggregate intrinsic value of unvested RSU awards at December 31 $ 2,975 $ 1,347 $ 1,359

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Schedule of the Income Tax Provision Allocated to Continuing Operations	Income tax expense consists of the following for the years ended December 31: (Dollars in thousands) 2016 2015 2014 Current $ (6,178 ) $ 128 $ 21,205 Deferred 2,143 1,097 (2,143 ) Net operating loss carryforwards (290 ) (6,793 ) 625 Income tax (benefit) provision $ (4,325 ) $ (5,568 ) $ 19,687
Schedule of Effective Income Tax Rate Reconciliation	Income tax expense differs from the amount computed by applying the statutory federal income tax rate of 35% to income before income taxes due to the following for the years ended December 31: (Dollars in thousands) 2016 2015 2014 U.S. federal statutory income tax $ 2,314 $ 9,151 $ 38,359 REIT income not subject to federal income tax (7,199 ) (14,110 ) (16,812 ) Intercompany profit-in-inventory elimination adjustment 1,465 — — Change in valuation allowance 162 488 (1,818 ) State income taxes, net of federal income tax (740 ) (838 ) 2,234 Domestic production activities deduction (2 ) — (1,055 ) Permanent book-tax differences (218 ) (70 ) (1,073 ) Research and development credits (689 ) — — All other items 582 (189 ) (148 ) Income tax provision (benefit) $ (4,325 ) $ (5,568 ) $ 19,687 Effective tax rate (65.4 %) (21.3 %) 18.0 %
Schedule of Deferred Tax Assets and Liabilities	The tax effects of significant temporary differences creating deferred tax assets and liabilities at December 31 were: (Dollars in thousands) 2016 2015 Deferred tax assets: Pensions $ 37,423 $ 35,066 Other postretirement employee benefits 13,002 13,834 Net operating loss carryforwards 983 6,935 Inventories 443 2,325 Tax credits 2,207 2,123 Nondeductible accruals 2,067 2,041 Incentive compensation 1,643 2,009 Employee benefits 1,444 1,769 Other 120 116 Total deferred tax assets 59,332 66,218 Valuation allowance (650 ) (488 ) Deferred tax assets, net of valuation allowance 58,682 65,730 Deferred tax liabilities: Timber and timberlands, net (2,165 ) (5,010 ) Property, plant and equipment, net (14,018 ) (14,120 ) Other (448 ) — Total deferred tax liabilities (16,631 ) (19,130 ) Net deferred tax assets $ 42,051 $ 46,600
Summary of Tax Years Subject to Examination by Major Taxing Jurisdictions	The following table summarizes the tax years subject to examination by major taxing jurisdictions: Jurisdiction Years Federal 2013 — 2016 Arkansas 2013 — 2016 Michigan 2012 — 2016 Minnesota 2012 — 2016 Idaho 2013 — 2016
Summary of Reconciliation of Unrecognized Tax Benefits	A reconciliation of the beginning and ending unrecognized tax benefits is as follows: (Dollars in thousands) 2016 Balance at January 1 $ — Additions for tax positions of prior years 850 Balance at December 31 $ 850

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	As of December 31, 2016, the future minimum rental payments required under our operating leases are as follows: (Dollars in thousands) 2017 $ 4,383 2018 3,638 2019 2,558 2020 1,878 2021 1,310 2022 and thereafter 1,426 Total $ 15,193

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting Information Additional Information [Abstract]
Summary of Information by Business Segment	The following table presents business segment information for each of the past three years. Corporate information is included to reconcile segment data to the Consolidated Financial Statements (Dollars in thousands) 2016 2015 2014 Revenues: Resource $ 256,163 $ 263,875 $ 252,581 Wood Products 367,426 336,214 376,239 Real Estate 32,604 28,989 40,460 656,193 629,078 669,280 Intersegment Resource revenues 1 (57,094 ) (53,742 ) (62,330 ) Total consolidated revenues $ 599,099 $ 575,336 $ 606,950 Income (loss) before income taxes: Resource $ 81,918 $ 76,350 $ 84,976 Wood Products 24,587 (5,235 ) 52,442 Real Estate 2 (29,495 ) 16,849 26,945 Eliminations and adjustments (3,001 ) 3,283 (190 ) 74,009 91,247 164,173 Corporate (38,455 ) (32,340 ) (31,667 ) Operating income 35,554 58,907 132,506 Interest expense, net (28,941 ) (32,761 ) (22,909 ) Income before income taxes $ 6,613 $ 26,146 $ 109,597 Depreciation, depletion and amortization: Resource $ 24,090 $ 28,807 $ 17,847 Wood Products 7,357 6,810 6,176 Real Estate 4 56 59 31,451 35,673 24,082 Corporate 760 951 1,307 Bond discount and deferred loan fees 1,979 1,481 1,360 Total depreciation, depletion and amortization $ 34,190 $ 38,105 $ 26,749 Basis of real estate sold: Real Estate $ 8,518 $ 7,394 $ 9,355 Elimination and adjustments (507 ) (382 ) (709 ) Total basis of real estate sold $ 8,011 $ 7,012 $ 8,646 Assets: Resource and Real Estate 3 $ 662,852 $ 837,630 $ 847,873 Wood Products 150,855 131,103 118,674 813,707 968,733 966,547 Corporate 113,974 47,879 65,199 Total consolidated assets $ 927,681 $ 1,016,612 $ 1,031,746 Capital Expenditures: 4 Resource $ 13,311 $ 13,497 $ 10,985 Wood Products 5,491 18,482 12,551 Real Estate 111 184 131 18,913 32,163 23,667 Corporate 375 569 565 Total capital expenditures $ 19,288 $ 32,732 $ 24,232 1 2 3 Assets are shown on a combined basis for the Resource and Real Estate segments, as we do not report assets separately to management for these segments. 4 Excludes the acquisition of timber and timberlands.
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area	All of our wood products facilities and all other assets are located within the continental United States. Geographic information regarding our revenues is as follows: (Dollars in thousands) 2016 2015 2014 United States $ 597,899 $ 573,398 $ 601,738 Canada 173 851 2,618 Mexico 1,027 919 2,594 Other — 168 — Total consolidated revenues $ 599,099 $ 575,336 $ 606,950

Financial Results by Quarter 42

Financial Results by Quarter (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Data [Abstract]
Schedule of Quarterly Financial Information	Three Months Ended March 31 June 30 September 30 December 31 (Dollars in thousands, except per share amounts) 2016 2015 2016 2015 2016 2015 2016 2015 Revenues $ 127,896 $ 134,125 $ 141,495 $ 128,747 $ 174,027 $ 174,475 $ 155,681 $ 137,989 Operating income (loss) $ 5,072 $ 14,027 $ (34,228 ) $ 7,311 $ 38,994 $ 27,714 $ 25,716 $ 9,855 Net income (loss) $ 157 $ 5,656 $ (31,238 ) $ 711 $ 27,646 $ 21,798 $ 14,373 $ 3,549 Net income (loss) per share 1 Basic $ — $ 0.14 $ (0.77 ) $ 0.02 $ 0.68 $ 0.53 $ 0.35 $ 0.09 Diluted $ — $ 0.14 $ (0.77 ) $ 0.02 $ 0.68 $ 0.53 $ 0.35 $ 0.09 1 Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year.
Summary of Adjustments Made to Financial Statements Reported at Interim Periods	The adjustments made to the financial statements reported at interim periods during 2016 are as follows: CONSOLIDATED BALANCE SHEETS March 31 June 30 September 30 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Cash and cash equivalents $ — $ 7,824 $ 7,824 $ — $ 65,378 $ 65,378 $ — $ 72,855 $ 72,855 Cash $ 7,789 $ (7,789 ) $ — $ 25,301 $ (25,301 ) $ — $ 32,734 $ (32,734 ) $ — Short-term investments $ 35 $ (35 ) $ — $ 40,077 $ (40,077 ) $ — $ 40,121 $ (40,121 ) $ — CONSOLIDATED STATEMENTS OF CASH FLOWS March 31 June 30 September 30 (Dollars in thousands) Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Previously Reported Effect of Change As Adjusted Change in short-term investments $ 4 $ (4 ) $ — $ (40,038 ) $ 40,038 $ — $ (40,082 ) $ 40,082 $ — Net cash from investing activities $ (3,054 ) $ (4 ) $ (3,058 ) $ 61,338 $ 40,038 $ 101,376 $ 56,040 $ 40,082 $ 96,122 Change in cash and cash equivalents $ (97 ) $ (4 ) $ (101 ) $ 17,415 $ 40,038 $ 57,453 $ 24,848 $ 40,082 $ 64,930 Cash and cash equivalents at beginning of year $ 7,886 $ 39 $ 7,925 $ 7,886 $ 39 $ 7,925 $ 7,886 $ 39 $ 7,925 Cash and cash equivalents at end of year $ 7,789 $ 35 $ 7,824 $ 25,301 $ 40,077 $ 65,378 $ 32,734 $ 40,121 $ 72,855

Summary of Significant Accoun43

Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands, a in Millions	12 Months Ended
	Dec. 31, 2016USD ($)a
Principle Accounting Policies [Line Items]
Timber And Timberlands Acres Owned | a	1.4
Operating Leases, Future Minimum Payments Due	$ 15,193
Allowance for doubtful accounts on accounts receivables	$ 500
Timber and Timberlands [Member] | Minimum [Member]
Principle Accounting Policies [Line Items]
Timber Volume Estimate, Review Period	5 years
Property, Plant and Equipment, Useful Life	5 years
Timber and Timberlands [Member] | Maximum [Member]
Principle Accounting Policies [Line Items]
Timber Volume Estimate, Review Period	10 years
Property, Plant and Equipment, Useful Life	20 years

Summary of Significant Accoun44

Summary of Significant Accounting Policies (Summary of Reclassification Adjustments) (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
		Mar. 31, 2016	Jun. 30, 2016	Sep. 30, 2016	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	[1]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash and cash equivalents		$ 7,824	$ 65,378	$ 72,855	$ 82,584	[1],[2]	$ 7,925	[1],[2]	$ 24,017	[1]	$ 49,032
Change in short-term investments	[1]						6,995		1,810
Net cash from investing activities		(3,058)	101,376	96,122	93,351		(33,589)		(406,756)
Change in cash and cash equivalents		(101)	57,453	64,930	74,659	[1]	(16,092)	[1]	(25,015)	[1]
Cash and cash equivalents at beginning of year		7,925	7,925	7,925	7,925		24,017		49,032
Cash and cash equivalents at end of year		7,824	65,378	72,855			7,925		24,017
Previously Reported [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash		7,789	25,301	32,734			7,886
Short-term investments		35	40,077	40,121			39
Change in short-term investments		(4)	40,038	40,082			26,329		25,883
Net cash from investing activities		(3,054)	61,338	56,040			(14,255)		(382,683)
Change in cash and cash equivalents		(97)	17,415	24,848			3,242		(942)
Cash and cash equivalents at beginning of year		7,886	7,886	7,886	7,886		4,644		5,586
Cash and cash equivalents at end of year		7,789	25,301	32,734			7,886		4,644
Effect of Change [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash and cash equivalents		7,824	65,378	72,855			7,925
Cash		(7,789)	(25,301)	(32,734)			(7,886)
Short-term investments		(35)	(40,077)	(40,121)			(39)
Change in short-term investments		4	(40,038)	(40,082)			(19,334)		(24,073)
Net cash from investing activities		(4)	40,038	40,082			(19,334)		(24,073)
Change in cash and cash equivalents		(4)	40,038	40,082			(19,334)		(24,073)
Cash and cash equivalents at beginning of year		39	39	39	$ 39		19,373		43,446
Cash and cash equivalents at end of year		$ 35	$ 40,077	$ 40,121			$ 39		$ 19,373
[1]	Certain short-term investments in 2015 and 2014 were reclassified to cash and cash equivalents to conform with the 2016 presentation.
[2]	Short-term investments as of December 31, 2015 were reclassified to cash and cash equivalents to conform with the 2016 presentation.

Earnings per Share (Reconciliat

Earnings per Share (Reconciliation Of Number Of Common Shares Used In Calculating Basic And Diluted EPS) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings per Share [Line Items]
Net income	$ 14,373		$ 27,646		$ (31,238)		$ 157		$ 3,549		$ 21,798		$ 711		$ 5,656		$ 10,938	$ 31,714	$ 89,910
Basic weighted-average shares outstanding																	40,797,806	40,842,126	40,748,924
Diluted weighted-average shares outstanding																	41,033,440	40,987,819	40,894,382
Basic net income per share	$ 0.35	[1]	$ 0.68	[1]	$ (0.77)	[1]	$ 0	[1]	$ 0.09	[1]	$ 0.53	[1]	$ 0.02	[1]	$ 0.14	[1]	$ 0.27	$ 0.78	$ 2.21
Diluted net income per share	$ 0.35	[1]	$ 0.68	[1]	$ (0.77)	[1]	$ 0	[1]	$ 0.09	[1]	$ 0.53	[1]	$ 0.02	[1]	$ 0.14	[1]	$ 0.27	$ 0.77	$ 2.20
Performance shares [Member]
Earnings per Share [Line Items]
Incremental shares																	200,164	122,334	117,830
Restricted stock units [Member]
Earnings per Share [Line Items]
Incremental shares																	35,470	23,359	27,628
[1]	Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year.

Earnings per Share (Narrative)

Earnings per Share (Narrative) (Details) - USD ($)	Apr. 26, 2016	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings per Share [Line Items]
Total anti-dilutive shares excluded from the calculation (in shares)			503	0	1,216
Stock repurchase program, period	24 months
Maximum [Member]
Earnings per Share [Line Items]
Stock repurchase program, authorized amount	$ 60,000,000
Common Stock [Member]
Earnings per Share [Line Items]
Common stock repurchased and retired, shares		169,625
Common stock repurchased and retired, average price per share		$ 35.08

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Logs	$ 23,342	$ 9,920
Lumber, plywood and veneer	20,500	16,932
Materials and supplies	8,780	8,310
Inventories, Total	52,622	35,162
Last-in, first-out basis	29,769	16,686
Average cost basis	$ 22,853	$ 18,476

Inventories (Narrative) (Detail

Inventories (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Last-In, First-Out Reserve	$ 11.1	$ 10.6	$ 11

Property, Plant and Equipment49

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Land	$ 4,712	$ 4,736
Buildings and improvements	54,448	54,362
Machinery and equipment	190,316	189,428
Construction in progress	1,437	224
Property, Plant and Equipment, Gross	250,913	248,750
Less: accumulated depreciation	(178,093)	(173,465)
Total property, plant and equipment, net	$ 72,820	$ 75,285
Minimum [Member] | Building and Improvements [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Minimum [Member] | Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Maximum [Member] | Building and Improvements [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Maximum [Member] | Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years

Property, Plant and Equipment50

Property, Plant and Equipment (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Depreciation	$ 8.3	$ 8.2	$ 8.1
Interest expense capitalized		$ 0.2	$ 0.1

Timber and Timberlands (Details

Timber and Timberlands (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Timber And Timberlands [Abstract]
Timber and timberlands	$ 572,273	$ 745,634
Logging roads	69,583	70,965
Total timber and timberlands, net	$ 641,856	$ 816,599

Timber and Timberlands (Narrati

Timber and Timberlands (Narrative) (Details) $ in Millions	Apr. 21, 2016USD ($)a	Jun. 30, 2016USD ($)a	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Timber And Timberlands [Line Items]
Depletion from Company Owned Lands			$ 20.8	$ 25.3	$ 14.5
Amortization of Logging Roads			$ 3.1	$ 3.1	$ 2.8
Acres sold through timberland sale | a	172,000	172,000
Land Sales	$ 114	$ 114
Real Estate [Member]
Timber And Timberlands [Line Items]
Net loss		$ 48.5

Timber and Timberlands (Schedul

Timber and Timberlands (Schedule of Future Payments Due Under Timber Cutting Contracts) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Timber And Timberlands [Abstract]
2,017	$ 6,741
2,018	5,275
2,019	1,604
2,020	32
2,021	275
Total	$ 13,927

Current Other Assets (Details)

Current Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Assets [Abstract]
Real estate held for sale	$ 9,184	$ 12,708
Prepaid expenses	1,939	1,531
Interest rate swaps	32	7
Total current other assets	$ 11,155	$ 14,246

Accounts Payable and Accrued 55

Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts Payable And Accrued Liabilities Current And Noncurrent [Abstract]
Accrued payroll and benefits	$ 13,634	$ 9,509
Accounts payable	8,382	6,351
Accrued interest	6,237	6,797
Accrued taxes	4,956	5,304
Other current liabilities	10,501	11,779
Total accounts payable and accrued liabilities	$ 43,710	$ 39,740

Debt (Schedule of Long-Term Deb

Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term principal	$ 587,485	$ 607,585
Less debt issuance costs	(3,015)	(3,037)
Less unamortized discounts	(729)	(1,248)
Total long-term debt (includes current portion)	583,988	603,881
Less current portion of long-term debt	(11,032)	(5,007)
Long-term debt	572,956	598,874
Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Long-term principal	247	581
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]
Debt Instrument [Line Items]
Long-term principal	349,500	322,000
Senior notes, 7.50%, due 2019 [Member]
Debt Instrument [Line Items]
Long-term principal	150,000	150,000
Revenue bonds, 2.75% due 2024 [Member]
Debt Instrument [Line Items]
Long-term principal	65,735	108,335
Medium-term notes, 8.75% to 8.89%, due 2017 through 2022 [Member]
Debt Instrument [Line Items]
Long-term principal	$ 22,250	$ 27,250

Debt (Schedule of Long-Term D57

Debt (Schedule of Long-Term Debt) (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2009
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]
Debt Instrument [Line Items]
Interest Rate	2.15%
Debt instrument maturity year, start	2,019
Debt instrument maturity year, end	2,026
Senior notes, 7.50%, due 2019 [Member]
Debt Instrument [Line Items]
Interest Rate	7.50%	7.50%	7.50%
Debt instrument maturity year	2,019
Revenue bonds, 2.75% due 2024 [Member]
Debt Instrument [Line Items]
Interest Rate	2.75%	2.75%
Debt instrument maturity year	2,024
Medium-term notes, 8.75% to 8.89%, due 2017 through 2022 [Member]
Debt Instrument [Line Items]
Debt instrument maturity year, start	2,017
Debt instrument maturity year, end	2,022
Minimum [Member] | Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]
Debt Instrument [Line Items]
Interest Rate	2.50%	2.50%
Minimum [Member] | Medium-term notes, 8.75% to 8.89%, due 2017 through 2022 [Member]
Debt Instrument [Line Items]
Interest Rate	8.75%	8.75%
Maximum [Member] | Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]
Debt Instrument [Line Items]
Interest Rate	3.00%	3.00%
Maximum [Member] | Medium-term notes, 8.75% to 8.89%, due 2017 through 2022 [Member]
Debt Instrument [Line Items]
Interest Rate	8.89%	8.89%
Debt Instrument, Redemption, Period One [Member] | Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]
Debt Instrument [Line Items]
Debt instrument maturity year, start	2,017
Debt instrument maturity year, end	2,024
Debt Instrument, Redemption, Period One [Member] | Minimum [Member] | Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]
Debt Instrument [Line Items]
Interest Rate	2.95%	2.95%
Debt Instrument, Redemption, Period One [Member] | Maximum [Member] | Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]
Debt Instrument [Line Items]
Interest Rate	4.64%	4.64%

Debt (Narrative) (Details)

Debt (Narrative) (Details)		1 Months Ended		12 Months Ended
		Aug. 31, 2016USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)Tranche	Dec. 31, 2009USD ($)	Jul. 31, 2016	Feb. 29, 2016USD ($)	Dec. 31, 2015USD ($)	Aug. 12, 2014USD ($)
Line of Credit Facility [Line Items]
Number of Tranches Included in Term Loan | Tranche				9
Long term debt maturity				$ 14,250,000
Long-term Debt, Maturities, Repayments of Principal in Year Five				40,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four				46,000,000
Long-term Debt, Gross	[1]			586,756,000				$ 606,337,000
Amount Available to Increase Borrowing Capacity									$ 250,000,000
Revolving line of credit borrowings				0				30,000,000
Remaining Borrowing Capacity				$ 248,800,000
Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum Borrowing Capacity									250,000,000
Additional Applicable Rate Added to Base Rate, Minimum				1.50%
Additional Applicable Rate Added to Base Rate, At End of Period				0.50%
Unused Capacity, Commitment Fee Percentage				0.25%
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Maximum Borrowing Capacity									40,000,000
Line of Credit Facility, Amount Outstanding				$ 1,200,000
Swing Line Loan [Member]
Line of Credit Facility [Line Items]
Maximum Borrowing Capacity									$ 25,000,000
Revenue Bonds [Member]
Line of Credit Facility [Line Items]
Interest Rate		2.75%	5.90%			6.00%
Long-term Debt, Gross		$ 65,700	$ 42,600,000
Debt instrument maturity year		2,024	2,026
Term Loan, Tranche One [Member]
Line of Credit Facility [Line Items]
Number of Tranches Included in Term Loan | Tranche				2
Term Loan, Tranche Five [Member]
Line of Credit Facility [Line Items]
Number of Tranches Included in Term Loan | Tranche				1
Long Term Debt, Maturities, Repayment of Principal in Year Ten				$ 27,500,000
LIBOR [Member] | Term Loan, Tranche Five [Member]
Line of Credit Facility [Line Items]
Interest Rate				2.15%
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.00%
Federal Fund Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.50%
Eurodollar [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.875%
Eurodollar [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.70%
Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.00%
Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.70%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]
Line of Credit Facility [Line Items]
Interest Rate				2.15%
Long-term Debt, Gross				$ 349,500,000			$ 27,500,000	$ 322,000,000
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest Rate				2.50%				2.50%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest Rate				3.00%				3.00%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Debt Instrument, Redemption, Period One [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Interest Rate				2.95%				2.95%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Debt Instrument, Redemption, Period One [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Interest Rate				4.64%				4.64%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche One [Member]
Line of Credit Facility [Line Items]
Long term debt maturity				$ 6,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Five				$ 6,000,000
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche One [Member] | Debt Instrument, Redemption, Period One [Member]
Line of Credit Facility [Line Items]
Interest Rate				2.95%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche One [Member] | Debt Instrument, Redemption, Period Two [Member]
Line of Credit Facility [Line Items]
Interest Rate				3.70%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche Two [Member]
Line of Credit Facility [Line Items]
Number of Tranches Included in Term Loan | Tranche				3
Long-term Debt, Maturities, Repayments of Principal in Year Five				$ 40,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four				40,000,000
Long Term Debt, Maturities, Repayment of Principal in Year Six				$ 40,000,000
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche Three [Member]
Line of Credit Facility [Line Items]
Number of Tranches Included in Term Loan | Tranche				2
Long Term Debt, Maturities, Repayment of Principal in Year Seven				$ 40,000,000
Long Term Debt, Maturities, Repayment of Principal in Year Eight				$ 40,000,000
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche Three [Member] | Debt Instrument, Redemption, Period One [Member]
Line of Credit Facility [Line Items]
Interest Rate				4.29%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche Three [Member] | Debt Instrument, Redemption, Period Two [Member]
Line of Credit Facility [Line Items]
Interest Rate				4.49%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche Four [Member]
Line of Credit Facility [Line Items]
Number of Tranches Included in Term Loan | Tranche				1
Long Term Debt, Maturities, Repayment of Principal in Year Nine				$ 110,000,000
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Term Loan, Tranche Four [Member] | Debt Instrument, Redemption, Period One [Member]
Line of Credit Facility [Line Items]
Interest Rate				4.64%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.85%
Debt instrument maturity year				2,026
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | LIBOR [Member] | Term Loan, Tranche Two [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.65%
Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | LIBOR [Member] | Term Loan, Tranche Two [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.90%
Senior notes, 7.50%, due 2019 [Member]
Line of Credit Facility [Line Items]
Interest Rate				7.50%	7.50%			7.50%
Long-term Debt, Gross				$ 149,271,000				$ 149,013,000
Debt instrument maturity year				2,019
Proceeds from Issuance of Debt					$ 150,000,000
[1]	The carrying amount of long-term debt includes principal and unamortized discounts.

Debt (Scheduled Payments Due on

Debt (Scheduled Payments Due on Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Long Term Debt By Maturity [Abstract]
2,017	$ 11,000
2,018	14,250
2,019	190,000
2,020	46,000
2,021	40,000
Thereafter	286,235
Debt Instrument, Face Amount	$ 587,485	$ 607,585

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2016USD ($)Derivative	Feb. 29, 2016USD ($)	Dec. 31, 2015USD ($)
Derivatives, Fair Value [Line Items]
Term loan debt	[1]	$ 586,756		$ 606,337
Net losses expected to be reclassified into earnings in the next twelve months		200
Term Loans [Member]
Derivatives, Fair Value [Line Items]
Term loan debt		$ 349,500	$ 27,500	$ 322,000
Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate swap agreements | Derivative		5
Notional amounts		$ 69,300
Medium-term notes		19,300
Senior Notes		$ 50,000
Interest Rate Swaps [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate swap agreements | Derivative		1
Notional amounts		$ 27,500
Swaps fixed interest rate		2.15%
LIBOR variable interest rate		3.88%
Interest Rate Swaps [Member] | Cash Flow Hedging [Member] | Term Loans [Member]
Derivatives, Fair Value [Line Items]
Term loan debt		$ 27,500
Derivative, termination year		2026-02
Interest Rate Swaps [Member] | Minimum [Member]
Derivatives, Fair Value [Line Items]
Swaps fixed interest rate		7.50%
LIBOR variable interest rate		5.84%
Interest Rate Swaps [Member] | Maximum [Member]
Derivatives, Fair Value [Line Items]
Swaps fixed interest rate		8.89%
LIBOR variable interest rate		6.29%
[1]	The carrying amount of long-term debt includes principal and unamortized discounts.

Derivative Instruments (Fair Va

Derivative Instruments (Fair Value of Cash Flow and Fair Value Derivative Instruments) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 1,395	$ 581
Liability Derivatives, Fair Value	91
Interest rate contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	32	7
Interest rate contracts [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	1,363	$ 574
Interest rate contracts [Member] | Long-term Debt [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 91

Derivative Instruments (Effect

Derivative Instruments (Effect of Derivatives on Consolidated Statements of Income) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Net effect on other comprehensive income		$ (701)	$ 0	$ 0
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, net of tax (effective portion)		(916)
Interest Expense [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain on interest rate contracts	[1]	805	$ 1,534	$ 979
Interest Expense [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss reclassified from accumulated other comprehensive income into interest expense (effective portion)	[1]	$ 215
[1]	Realized gains and losses on interest rate contracts consist of net cash received or paid and interest accruals on the interest rate swaps during the periods. Net cash received or paid is included in the supplemental cash flow information within interest, net of amounts capitalized in the Consolidated Statements of Cash Flows

Financial Instruments (Estimate

Financial Instruments (Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Thousands

Dec. 31, 2016

Sep. 30, 2016

Jun. 30, 2016

Mar. 31, 2016

Feb. 29, 2016

Dec. 31, 2015

Dec. 31, 2014

[1]

Dec. 31, 2013

[1]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Cash and cash equivalents, Carrying Amount

$ 82,584

[1],[2]

$ 72,855

$ 65,378

$ 7,824

$ 7,925

[1],[2]

$ 24,017

$ 49,032

Long-term debt, including current portion, Carrying Amount

[3]

(586,756)

(606,337)

Company owned life insurance (COLI), Carrying Amount

70

687

Level 1 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Cash and cash equivalents, Fair Value

82,584

7,925

Level 2 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Fair Value

[3]

(601,290)

(625,440)

Level 3 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Company owned life insurance (COLI), Fair Value

70

687

Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Carrying Amount

(349,500)

$ (27,500)

(322,000)

Term loans, variable rate 2.50% to 3.00% due 2019 through 2026 and fixed rate 2.95% to 4.64% due 2017 through 2024 [Member] | Level 2 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Fair Value

(350,909)

(322,000)

Senior notes, 7.50%, due 2019 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Carrying Amount

(149,271)

(149,013)

Senior notes, 7.50%, due 2019 [Member] | Level 2 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Fair Value

(164,250)

(165,375)

Revenue bonds, 2.75% due 2024 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Carrying Amount

(65,735)

(108,074)

Revenue bonds, 2.75% due 2024 [Member] | Level 2 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Fair Value

(62,205)

(108,454)

Medium-term notes, 8.75% to 8.89%, due 2017 through 2022 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Carrying Amount

(22,250)

(27,250)

Medium-term notes, 8.75% to 8.89%, due 2017 through 2022 [Member] | Level 2 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Long-term debt, including current portion, Fair Value

(23,926)

(29,611)

Interest rate contracts [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Derivative assets related to interest rate swaps, Carrying Amount

1,395

581

Derivative liabilities related to interest rate swaps, Carrying Amount

(91)

Interest rate contracts [Member] | Level 2 [Member]

Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]

Derivative assets related to interest rate swaps, Fair Value

1,395

$ 581

Derivative liabilities related to interest rate swaps, Fair Value

$ (91)

[1]

Certain short-term investments in 2015 and 2014 were reclassified to cash and cash equivalents to conform with the 2016 presentation.

[2]

Short-term investments as of December 31, 2015 were reclassified to cash and cash equivalents to conform with the 2016 presentation.

[3]

The carrying amount of long-term debt includes principal and unamortized discounts.

Savings Plans, Pension Plans 64

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
401(K) contributions by employer	$ 2,100,000	$ 2,100,000	$ 2,000,000
Decrease in accumulated postretirement benefit obligations				$ 76,700,000
Accumulated benefit obligation	379,500,000	375,500,000
Non-qualified pension plan and other postretirement employee benefit, estimated payments in next fiscal year	$ 5,800,000
Expected return on plan assets	6.50%
Health care cost trend rate assumed for next fiscal year	7.90%
Defined Benefit Plan, Assumption Health Care Cost Trend Rate for Next Fiscal Year	4.20%
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments in Level 3	$ 0	$ 0
Management Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Annual incentive plan, employee permitted minimum defer percentage	50.00%
Annual incentive plan, employee permitted maximum defer percentage	100.00%
Management Deferred Compensation Plan [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Basic salary defer percentage	50.00%
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net loss to be amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost	$ 15,400,000
Estimated prior service cost to be amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost	$ 300,000
Expected return on plan assets	6.50%	6.75%	7.50%
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated net loss to be amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost	$ 1,600,000
Estimated prior service cost to be amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost	$ 8,900,000
Expected return on plan assets	0.00%	0.00%	0.00%

Savings Plans, Pension Plans 65

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Change in Benefit Obligation, Plan Assets and Funded Status for Company-Sponsored Benefit Plans and Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 292,200
Fair value of plan assets at end of year	289,675	$ 292,200
Amounts recognized in the consolidated balance sheets [Abstract]
Noncurrent liabilities	(123,284)	(119,369)
Pension Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	(382,071)	(417,694)
Service cost	(6,508)	(6,159)	$ (5,081)
Interest cost	(17,020)	(17,012)	(19,184)
Actuarial gain (loss)	(13,997)	27,094
Benefits paid	34,135	31,700
Benefit obligation at end of year	(385,461)	(382,071)	(417,694)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	292,200	337,059
Actual return on plan assets	28,626	(14,970)
Employer contributions and benefit payments	2,984	1,811
Benefits paid	(34,135)	(31,700)
Fair value of plan assets at end of year	289,675	292,200	337,059
Amounts recognized in the consolidated balance sheets [Abstract]
Current liabilities	(1,824)	(1,791)
Noncurrent liabilities	(93,962)	(88,080)
Funded status	(95,786)	(89,871)
Other Postretirement Employee Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	(35,471)	(41,561)
Service cost	(14)	(22)	(25)
Interest cost	(1,421)	(1,456)	(1,741)
Actuarial gain (loss)	(313)	3,778
Benefits paid	3,882	3,790
Benefit obligation at end of year	(33,337)	(35,471)	$ (41,561)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions and benefit payments	3,882	3,790
Benefits paid	(3,882)	(3,790)
Amounts recognized in the consolidated balance sheets [Abstract]
Current liabilities	(4,015)	(4,182)
Noncurrent liabilities	(29,322)	(31,289)
Funded status	$ (33,337)	$ (35,471)

Savings Plans, Pension Plans 66

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Long-Term Asset Allocation Ranges) (Details)	12 Months Ended
	Dec. 31, 2016
Minimum [Member]
Domestic and international equities	24.00%
Fixed income securities	38.00%
Alternatives, which may include equities and fixed income securities	12.00%
Cash	0.00%
Maximum [Member]
Domestic and international equities	48.00%
Fixed income securities	58.00%
Alternatives, which may include equities and fixed income securities	18.00%
Cash	5.00%

Savings Plans, Pension Plans 67

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Weighted Average Asset Allocations of the Pension Benefit Plans' Assets) (Details) - Pension Plans [Member]	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Domestic Equity Securities [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	36.00%	35.00%
Fixed income [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	48.00%	48.00%
Other notes [Member]
Defined Benefit Plan, Actual Plan Asset Allocations	16.00%	17.00%

Savings Plans, Pension Plans 68

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Fair Value Measurements) (Details) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Fair Value of Plan Assets		$ 289,675	$ 292,200
Cash and Cash Equivalents [Member]
Fair Value of Plan Assets		2,845	5,591
Domestic Equity Securities [Member]
Fair Value of Plan Assets	[1]	51,688	51,872
International Equity Securities [Member]
Fair Value of Plan Assets	[2]	26,555	26,144
Emerging Markets [Member]
Fair Value of Plan Assets	[3]	26,403	25,512
Fixed Income Securities [Member]
Fair Value of Plan Assets	[4]	138,897	138,906
Alternative Securities [Member]
Fair Value of Plan Assets	[5]	43,287	44,175
Level 1 [Member]
Fair Value of Plan Assets		167,163	172,992
Level 1 [Member] | Cash and Cash Equivalents [Member]
Fair Value of Plan Assets		2,845	5,591
Level 1 [Member] | Domestic Equity Securities [Member]
Fair Value of Plan Assets	[1]	25,409	26,253
Level 1 [Member] | International Equity Securities [Member]
Fair Value of Plan Assets	[2]		411
Level 1 [Member] | Emerging Markets [Member]
Fair Value of Plan Assets	[3]	12	1,831
Level 1 [Member] | Fixed Income Securities [Member]
Fair Value of Plan Assets	[4]	138,897	138,906
Level 2 [Member]
Fair Value of Plan Assets		122,512	119,208
Level 2 [Member] | Domestic Equity Securities [Member]
Fair Value of Plan Assets	[1]	26,279	25,619
Level 2 [Member] | International Equity Securities [Member]
Fair Value of Plan Assets	[2]	26,555	25,733
Level 2 [Member] | Emerging Markets [Member]
Fair Value of Plan Assets	[3]	26,391	23,681
Level 2 [Member] | Alternative Securities [Member]
Fair Value of Plan Assets	[5]	$ 43,287	$ 44,175
[1]	Level 1 assets are managed investments in U.S. small/mid-cap equities that track the Russell 2500 Growth index or Russell 2500 Value index. Level 2 assets are collective investments, which are invested in U.S. large-cap equities that track the S&P 500.
[2]	Level 1 assets are managed investments in small/mid-cap equities across developed markets around the world. Level 2 assets are collective investments in equity funds of developed markets outside of the United States and Canada that track the MSCI EAFE Value index or MSCI EAFE Growth index
[3]	Level 1 assets are mutual funds which are invested in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index. Level 2 assets are collective investments in the common stock of companies located (or with primary operations) in emerging markets that track the MSCI Emerging Markets index.
[4]	Level 1 assets are mutual funds and investments in a diversified portfolio of fixed income instruments of varying maturities representing corporates, sovereign debt, U.S. treasuries and municipals that track the Barclay's Long Term Credit index.
[5]	Level 2 assets are collective investments in inflation-indexed bonds, securities of real estate companies, commodity index-linked notes, fixed income securities, foreign currencies, securities of natural resource companies, master limited partnerships, publicly listed infrastructure companies, floating-rate debt, securities of global agriculture companies and securities of global timber companies.

Savings Plans, Pension Plans 69

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Pre-Tax Components Of Net Periodic Cost (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6,508	$ 6,159	$ 5,081
Interest cost	17,020	17,012	19,184
Expected return on plan assets	(18,999)	(20,804)	(24,512)
Amortization of prior service cost (credit)	518	605	748
Amortization of actuarial loss	16,339	17,937	14,451
Net periodic cost (benefit)	21,386	20,909	14,952
Other Postretirement Employee Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	22	25
Interest cost	1,421	1,456	1,741
Amortization of prior service cost (credit)	(8,877)	(9,312)	(9,641)
Amortization of actuarial loss	1,717	2,047	2,186
Net periodic cost (benefit)	$ (5,725)	$ (5,787)	$ (5,689)

Savings Plans, Pension Plans 70

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Other Amounts Recognized in Consolidated Statements of Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net amount at beginning of year	$ (114,503)
Taxes	(1,826)	$ (1,913)	$ (15,598)
Net amount arising during the period	(2,857)	(2,990)	(24,396)
Net reclassifications during the period	(3,058)	(3,889)	19,672
Net amount at end of year	(110,744)	(114,503)
Pension Plans [Member]
Net amount at beginning of year	128,244	134,261	117,167
Net loss (gain)	4,370	8,680	43,223
Taxes	(1,704)	(3,386)	(16,857)
Net amount arising during the period	2,666	5,294	26,366
Amortization of prior service (cost) credit	(518)	(605)	(748)
Amortization of actuarial loss	(16,339)	(17,937)	(14,451)
Taxes	6,574	7,231	5,927
Net reclassifications during the period	(10,283)	(11,311)	(9,272)
Net amount at end of year	120,627	128,244	134,261
Other Postretirement Employee Benefits [Member]
Net amount at beginning of year	(13,741)	(15,869)	(18,447)
Net loss (gain)	313	(3,777)	(3,229)
Taxes	(122)	1,473	1,259
Net amount arising during the period	191	(2,304)	(1,970)
Amortization of prior service (cost) credit	8,877	9,312	9,641
Amortization of actuarial loss	(1,717)	(2,047)	(2,186)
Taxes	(2,792)	(2,833)	(2,907)
Net reclassifications during the period	4,368	4,432	4,548
Net amount at end of year	$ (9,182)	$ (13,741)	$ (15,869)

Savings Plans, Pension Plans 71

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Amounts Recognized in AOCI on Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net amount recognized	$ (110,744)	$ (114,503)
Pension Plans [Member]
Net loss	120,006	127,307
Prior service cost (credit)	621	937
Net amount recognized	120,627	128,244	$ 134,261	$ 117,167
Other Postretirement Employee Benefits [Member]
Net loss	8,778	9,634
Prior service cost (credit)	(17,960)	(23,375)
Net amount recognized	$ (9,182)	$ (13,741)	$ (15,869)	$ (18,447)

Savings Plans, Pension Plans 72

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Schedule of Estimated Future Benefit Payments) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Pension Plans [Member]
2,017	$ 28,846
2,018	28,534
2,019	28,189
2,020	27,964
2,021	27,609
2022–2026	132,424
Other Postretirement Employee Benefits [Member]
2,017	4,015
2,018	3,727
2,019	3,470
2,020	3,255
2,021	2,987
2022–2026	$ 11,940

Savings Plans, Pension Plans 73

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Weighted Average Assumptions Used to Determine the Benefit Obligation) (Details)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Plans [Member]
Discount rate	4.40%	4.65%	4.25%
Rate of salaried compensation increase	3.00%	3.00%	3.00%
Other Postretirement Employee Benefits [Member]
Discount rate	4.10%	4.25%	3.90%
Rate of salaried compensation increase	0.00%	0.00%	0.00%

Savings Plans, Pension Plans 74

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Weighted Average Assumptions used to Determine the Net Periodic Cost (Benefit)) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Expected return on plan assets	6.50%
Pension Plans [Member]
Discount rate	4.65%	4.25%	5.10%
Expected return on plan assets	6.50%	6.75%	7.50%
Rate of salaried compensation increase	3.00%	3.00%	3.00%
Other Postretirement Employee Benefits [Member]
Discount rate	4.25%	3.90%	4.45%
Expected return on plan assets	0.00%	0.00%	0.00%
Rate of salaried compensation increase	0.00%	0.00%	0.00%

Savings Plans, Pension Plans 75

Savings Plans, Pension Plans and Other Postretirement Employee Benefits (One Percent Point Change in Health Care Cost Trend Rate Effect) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Savings Plans Pension Plans And Other Postretirement Employee Benefits [Abstract]
Effect on total service and interest cost components, 1% increase	$ 3
Effect on total service and interest cost components, 1% decrease	(3)
Effect on accumulated postretirement benefit obligation, 1% increase	67
Effect on accumulated postretirement benefit obligation, 1% decrease	$ (64)

Equity-Based Compensation Pla76

Equity-Based Compensation Plans (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Unit, Vested, Issuance Deferred	72,127
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Shares Outstanding	161,297
Performance shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance share award granted under stock incentive plan, performance period	3 years
Unrecognized compensation cost | $	$ 3.4
Weighted average period (in years)	1 year 7 months 6 days
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost | $	$ 1.1
Weighted average period (in years)	1 year 3 months 18 days
Minimum [Member] | Performance shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Actually Issued, as a Percent of the Amount Subject to the Performance Share Award	0.00%
Minimum [Member] | Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	1 year
Maximum [Member] | Performance shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares Actually Issued, as a Percent of the Amount Subject to the Performance Share Award	200.00%
Maximum [Member] | Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	3 years
2005 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	1,600,000
2014 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	1,000,000
2005 and 2014 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized	1,100,000

Equity-Based Compensation Pla77

Equity-Based Compensation Plans (Details Of Equity-Based Compensation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	$ 4,390	$ 4,758	$ 4,137
Deferred compensation stock equivalent units expense	732	376	345
Total tax benefit recognized for shared-based payment awards	317	319	280
Performance shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	3,437	3,877	3,515
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee equity-based compensation expense	$ 953	$ 881	$ 622

Equity-Based Compensation Pla78

Equity-Based Compensation Plans (Fair Value of Performance Share Awards) (Details) - Performance Shares [Member] - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price as of valuation date (in dollars per share)	$ 25.92	$ 40	$ 39.76
Risk-free rate	0.88%	1.07%	0.72%
Expected volatility	23.82%	21.09%	26.29%
Expected dividends	5.79%	3.75%	3.52%
Expected term (years)	3 years	3 years	3 years
Fair value of a performance share	$ 30.02	$ 36.71	$ 45.57

Equity-Based Compensation Pla79

Equity-Based Compensation Plans (Summary Of Outstanding Performance Shares/Restricted Stock Units) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Performance shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested shares outstanding at January 1, Shares	161,049	160,233	155,814
Granted (in shares)	125,469	78,974	87,441
Vested (in shares)	(82,730)	(77,078)	(76,202)
Forfeited (in shares)		(1,080)	(6,820)
Unvested shares outstanding at December 31, Shares	203,788	161,049	160,233
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	$ 3,770	$ 4,839	$ 2,609
Aggregate Intrinsic Value	$ 8,488	$ 4,697	$ 6,709
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested shares outstanding at January 1, Weighted Average Grant Date Fair Value (in dollars per share)	$ 41.26	$ 53.86	$ 48.73
Granted, Weighted Average Exercise Price (in dollars per share)	30.02	36.71	45.57
Vested, Weighted Average Grant Date Fair Value (in dollars per share)	45.57	62.78	34.24
Forfeited, Weighted Average Grant Date Fair Value (in dollars per share)		41.29	49.75
Unvested shares outstanding at December 31, Weighted Average Grant Date Fair Value (in dollars per share)	$ 32.59	$ 41.26	$ 53.86
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested shares outstanding at January 1, Shares	44,531	32,455	37,461
Granted (in shares)	43,320	27,820	19,599
Vested (in shares)	(16,431)	(15,385)	(21,333)
Forfeited (in shares)		(359)	(3,272)
Unvested shares outstanding at December 31, Shares	71,420	44,531	32,455
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	$ 656	$ 289	$ 735
Aggregate Intrinsic Value	$ 2,975	$ 1,347	$ 1,359
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested shares outstanding at January 1, Weighted Average Grant Date Fair Value (in dollars per share)	$ 40.95	$ 42.24	$ 38.69
Granted, Weighted Average Exercise Price (in dollars per share)	26.08	39.99	40.51
Vested, Weighted Average Grant Date Fair Value (in dollars per share)	39.92	44.50	34.46
Forfeited, Weighted Average Grant Date Fair Value (in dollars per share)		40.27	42.06
Unvested shares outstanding at December 31, Weighted Average Grant Date Fair Value (in dollars per share)	$ 31.61	$ 40.95	$ 42.24

Income Taxes (Schedule of Incom

Income Taxes (Schedule of Income Tax Provision (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current	$ (6,178)	$ 128	$ 21,205
Deferred	2,143	1,097	(2,143)
Net operating loss carryforwards	(290)	(6,793)	625
Income tax (benefit) provision	$ (4,325)	$ (5,568)	$ 19,687

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Statutory Federal Income Tax Rate	35.00%
Idaho Investment Tax Credits	$ 3,400,000
Valuation allowance	650,000	$ 488,000	$ 0
Change in Valuation Allowance	200,000
Unrecognized tax benefits	$ 850,000	$ 0	$ 0
Earliest Tax Year [Member]
Income Taxes [Line Items]
Idaho Investment Tax Credits expiration year	2,017
Latest Tax Year [Member]
Income Taxes [Line Items]
Idaho Investment Tax Credits expiration year	2,030
Federal [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	$ 0
State and Local [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	$ 21,600,000
State and Local [Member] | Earliest Tax Year [Member]
Income Taxes [Line Items]
Operating Loss expiration year	2,017
State and Local [Member] | Latest Tax Year [Member]
Income Taxes [Line Items]
Operating Loss expiration year	2,036

Income Taxes (Schedule of Recon

Income Taxes (Schedule of Reconciliation of Income Tax Provision (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax	$ 2,314	$ 9,151	$ 38,359
REIT income not subject to federal income tax	(7,199)	(14,110)	(16,812)
Intercompany profit-in-inventory elimination adjustment	1,465
Change in valuation allowance	162	488	(1,818)
State income taxes, net of federal income tax	(740)	(838)	2,234
Domestic production activities deduction	(2)		(1,055)
Permanent book-tax differences	(218)	(70)	(1,073)
Research and development credits	(689)
All other items	582	(189)	(148)
Income tax (benefit) provision	$ (4,325)	$ (5,568)	$ 19,687
Effective tax rate	(65.40%)	(21.30%)	18.00%

Income Taxes (Schedule of Compo

Income Taxes (Schedule of Components of Deferred Income Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Pensions	$ 37,423	$ 35,066
Other postretirement employee benefits	13,002	13,834
Net operating loss carryforwards	983	6,935
Inventories	443	2,325
Tax credits	2,207	2,123
Nondeductible accruals	2,067	2,041
Incentive compensation	1,643	2,009
Employee benefits	1,444	1,769
Other	120	116
Total deferred tax assets	59,332	66,218
Valuation allowance	(650)	(488)	$ 0
Deferred tax assets, net of valuation allowance	58,682	65,730
Timber and timberlands, net	(2,165)	(5,010)
Property, plant and equipment, net	(14,018)	(14,120)
Other	(448)
Total deferred tax liabilities	(16,631)	(19,130)
Net deferred tax assets	$ 42,051	$ 46,600

Income Taxes (Summary of Tax Ye

Income Taxes (Summary of Tax Years Subject to Examination by Major Taxing Jurisdictions) (Details)	12 Months Ended
	Dec. 31, 2016
Federal [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,013
Federal [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,016
State and Local [Member] | Arkansas [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,013
State and Local [Member] | Arkansas [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,016
State and Local [Member] | Michigan [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,012
State and Local [Member] | Michigan [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,016
State and Local [Member] | Minnesota [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,012
State and Local [Member] | Minnesota [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,016
State and Local [Member] | Idaho [Member] | Earliest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,013
State and Local [Member] | Idaho [Member] | Latest Tax Year [Member]
Income Tax Examination [Line Items]
Tax years subject to examination	2,016

Income Taxes (Summary of Reconc

Income Taxes (Summary of Reconciliation of Unrecognized Tax Benefits) (Details)	12 Months Ended
	Dec. 31, 2016USD ($)
Income Tax Disclosure [Abstract]
Balance at January 1	$ 0
Additions for tax positions of prior years	850,000
Balance at December 31	$ 850,000

Commitments and Contingencies86

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 25, 2015	May 23, 2012	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2016	Mar. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Operating leases expiration, year			2,033
Rent Expense			$ 4,200	$ 4,600	$ 4,000
Loss Contingency Accrual, Payments		$ 1,750
Loss Contingency, Damages Sought, Value	$ 9,800
Loss Contingency Accrual						$ 800	$ 200
Extended tolling agreement for final settlement and release			May 22, 2017

Commitments and Contingencies87

Commitments and Contingencies (Future Minimum Rental Payments) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,017	$ 4,383
2,018	3,638
2,019	2,558
2,020	1,878
2,021	1,310
2022 and thereafter	1,426
Total	$ 15,193

Segment Information (Narrative)

Segment Information (Narrative) (Details)	12 Months Ended
	Dec. 31, 2016SegmentCustomer	Dec. 31, 2015Customer	Dec. 31, 2014Customer
Segment Reporting [Abstract]
Number of reportable segments | Segment	3
Concentration Risk, Customer | Customer	1	1	1
Concentration Risk, Percentage	10.00%	10.00%	10.00%

Segment Information (Summary Of

Segment Information (Summary Of Information By Business Segment) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Segment Revenues		$ 155,681	$ 174,027	$ 141,495	$ 127,896	$ 137,989	$ 174,475	$ 128,747	$ 134,125	$ 599,099	$ 575,336	$ 606,950
Operating income		25,716	$ 38,994	$ (34,228)	$ 5,072	9,855	$ 27,714	$ 7,311	$ 14,027	35,554	58,907	132,506
Interest expense, net										(28,941)	(32,761)	(22,909)
Income before income taxes										6,613	26,146	109,597
Depreciation, depletion and amortization										34,190	38,105	26,749
Bond discount and deferred loan fees										1,979	1,481	1,360
Basis of real estate sold										8,011	7,012	8,646
Assets		927,681				1,016,612				927,681	1,016,612	1,031,746
Capital Expenditures	[1]									19,288	32,732	24,232
Operating Segments [Member]
Segment Reporting Information [Line Items]
Segment Revenues										656,193	629,078	669,280
Operating income										74,009	91,247	164,173
Depreciation, depletion and amortization										31,451	35,673	24,082
Assets		813,707				968,733				813,707	968,733	966,547
Capital Expenditures	[1]									18,913	32,163	23,667
Operating Segments [Member] | Resource [Member]
Segment Reporting Information [Line Items]
Segment Revenues										256,163	263,875	252,581
Operating income										81,918	76,350	84,976
Depreciation, depletion and amortization										24,090	28,807	17,847
Capital Expenditures	[1]									13,311	13,497	10,985
Operating Segments [Member] | Wood Products [Member]
Segment Reporting Information [Line Items]
Segment Revenues										367,426	336,214	376,239
Operating income										24,587	(5,235)	52,442
Depreciation, depletion and amortization										7,357	6,810	6,176
Assets		150,855				131,103				150,855	131,103	118,674
Capital Expenditures	[1]									5,491	18,482	12,551
Operating Segments [Member] | Real Estate [Member]
Segment Reporting Information [Line Items]
Segment Revenues										32,604	28,989	40,460
Operating income	[2]									(29,495)	16,849	26,945
Depreciation, depletion and amortization										4	56	59
Basis of real estate sold										8,518	7,394	9,355
Capital Expenditures	[1]									111	184	131
Operating Segments [Member] | Resource and Real Estate [Member]
Segment Reporting Information [Line Items]
Assets	[3]	662,852				837,630				662,852	837,630	847,873
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Segment Revenues	[4]									(57,094)	(53,742)	(62,330)
Operating income										(3,001)	3,283	(190)
Basis of real estate sold										(507)	(382)	(709)
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income										(38,455)	(32,340)	(31,667)
Depreciation, depletion and amortization										760	951	1,307
Assets		$ 113,974				$ 47,879				113,974	47,879	65,199
Capital Expenditures	[1]									$ 375	$ 569	$ 565
[1]	Excludes the acquisition of timber and timberlands.
[2]	In the second quarter of 2016, we sold approximately 172,000 acres of timberlands located in central Idaho for $114 million at a loss of $48.5 million before taxes.
[3]	Assets are shown on a combined basis for the Resource and Real Estate segments, as we do not report assets separately to management for these segments.
[4]	Intersegment revenues are based on prevailing market prices of logs sold by our Resource segment to the Wood Products segment.

Segment Information (Summary 90

Segment Information (Summary Of Information By Business Segment) (Parenthetical) (Details) $ in Millions	Apr. 21, 2016USD ($)a	Jun. 30, 2016USD ($)a
Segment Reporting Information [Line Items]
Acres sold through timberland sale | a	172,000	172,000
Land Sales	$ 114	$ 114
Real Estate [Member]
Segment Reporting Information [Line Items]
Net loss		48.5
Operating Segments [Member] | Real Estate [Member]
Segment Reporting Information [Line Items]
Net loss		$ 48.5

Segment Information (Schedule o

Segment Information (Schedule of Revenue by Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues	$ 155,681	$ 174,027	$ 141,495	$ 127,896	$ 137,989	$ 174,475	$ 128,747	$ 134,125	$ 599,099	$ 575,336	$ 606,950
United States
Revenues									597,899	573,398	601,738
Canada
Revenues									173	851	2,618
Mexico
Revenues									$ 1,027	919	$ 2,594
Other
Revenues										$ 168

Financial Results by Quarter 92

Financial Results by Quarter (Unaudited) Financial Results by Quarter (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Data [Abstract]
Revenues	$ 155,681		$ 174,027		$ 141,495		$ 127,896		$ 137,989		$ 174,475		$ 128,747		$ 134,125		$ 599,099	$ 575,336	$ 606,950
Operating income (loss)	25,716		38,994		(34,228)		5,072		9,855		27,714		7,311		14,027		35,554	58,907	132,506
Net income (loss)	$ 14,373		$ 27,646		$ (31,238)		$ 157		$ 3,549		$ 21,798		$ 711		$ 5,656		$ 10,938	$ 31,714	$ 89,910
Basic (in dollars per share)	$ 0.35	[1]	$ 0.68	[1]	$ (0.77)	[1]	$ 0	[1]	$ 0.09	[1]	$ 0.53	[1]	$ 0.02	[1]	$ 0.14	[1]	$ 0.27	$ 0.78	$ 2.21
Diluted (in dollars per share)	$ 0.35	[1]	$ 0.68	[1]	$ (0.77)	[1]	$ 0	[1]	$ 0.09	[1]	$ 0.53	[1]	$ 0.02	[1]	$ 0.14	[1]	$ 0.27	$ 0.77	$ 2.20
[1]	Per share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts may not equal the total computed for the year.

Financial Results by Quarter 93

Financial Results by Quarter (Unaudited) - Summary of Adjustments Made to Financial Statements Reported at Interim Periods (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
		Mar. 31, 2016	Jun. 30, 2016	Sep. 30, 2016	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	[1]
Effect Of Fourth Quarter Events [Line Items]
Cash and cash equivalents		$ 7,824	$ 65,378	$ 72,855	$ 82,584	[1],[2]	$ 7,925	[1],[2]	$ 24,017	[1]	$ 49,032
Change in short-term investments	[1]						(6,995)		(1,810)
Net cash from investing activities		(3,058)	101,376	96,122	93,351		(33,589)		(406,756)
Change in cash and cash equivalents		(101)	57,453	64,930	74,659	[1]	(16,092)	[1]	(25,015)	[1]
Cash and cash equivalents at beginning of year		7,925	7,925	7,925	7,925		24,017		49,032
Cash and cash equivalents at end of year		7,824	65,378	72,855			7,925		24,017
Previously Reported [Member]
Effect Of Fourth Quarter Events [Line Items]
Cash		7,789	25,301	32,734			7,886
Short-term investments		35	40,077	40,121			39
Change in short-term investments		4	(40,038)	(40,082)			(26,329)		(25,883)
Net cash from investing activities		(3,054)	61,338	56,040			(14,255)		(382,683)
Change in cash and cash equivalents		(97)	17,415	24,848			3,242		(942)
Cash and cash equivalents at beginning of year		7,886	7,886	7,886	7,886		4,644		5,586
Cash and cash equivalents at end of year		7,789	25,301	32,734			7,886		4,644
Effect of Change [Member]
Effect Of Fourth Quarter Events [Line Items]
Cash and cash equivalents		7,824	65,378	72,855			7,925
Cash		(7,789)	(25,301)	(32,734)			(7,886)
Short-term investments		(35)	(40,077)	(40,121)			(39)
Change in short-term investments		(4)	40,038	40,082			19,334		24,073
Net cash from investing activities		(4)	40,038	40,082			(19,334)		(24,073)
Change in cash and cash equivalents		(4)	40,038	40,082			(19,334)		(24,073)
Cash and cash equivalents at beginning of year		39	39	39	$ 39		19,373		43,446
Cash and cash equivalents at end of year		$ 35	$ 40,077	$ 40,121			$ 39		$ 19,373
[1]	Certain short-term investments in 2015 and 2014 were reclassified to cash and cash equivalents to conform with the 2016 presentation.
[2]	Short-term investments as of December 31, 2015 were reclassified to cash and cash equivalents to conform with the 2016 presentation.